Add documentation for pull resistor component

[Nihal4777]

Fixes #426

Changes done:

• Added documentation for pull resistor component

Screenshots:

Preview Link(s):

✅️ By submitting this PR, I have verified the following

• Checked to see if a similar PR has already been opened 🤔️
• Reviewed the contributing guidelines 🔍️
• Sample preview link added (add a link from the checks tab after checks complete)
• Tried Squashing the commits into one

Summary by CodeRabbit

• Documentation
  • Introduced documentation for the Random input element.
  • Added comprehensive Pull Resistor documentation covering its role in stabilizing floating inputs, including properties, port configurations, behavior details, and practical usage examples with state tables.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

The Input chapter documentation was updated with new content for "Random" and "Pull Resistor" elements. The "Pull Resistor" section includes property definitions (pullDirection and Direction), port information, and behavioral details describing how it stabilizes floating inputs to a defined logic level. An example scenario demonstrates the pull resistor with a tri-state buffer and button control, including a state/output summary table. The build configuration was also updated to specify Node.js version 22 for the build environment.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Out of Scope Changes check	⚠️ Warning	The netlify.toml change (Node.js version 22) is out of scope; the PR should focus on documentation per #426, not build environment configuration.	Remove the netlify.toml change or move it to a separate PR focused on build environment updates, keeping this PR scoped to documentation only.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: adding documentation for the pull resistor component, which is the primary objective of the PR.
Linked Issues check	✅ Passed	The PR fulfills #426 by documenting the Pull Resistor component, explaining its behavior for pull-up/pull-down simulation, usage, and purpose within the simulator.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between fc3a783 and 4c6f50c.

📒 Files selected for processing (1)

• netlify.toml

🔇 Additional comments (1)

netlify.toml (1)

6-7: Node.js version compatibility is sound. The repo's package.json declares "node": ">=18.0", which is satisfied by Node 22, and Netlify fully supports Node 22. No .nvmrc or .node-version files override this. Note: ensure any Docusaurus or build plugins don't explicitly require Node <20, as they may fail with Node 22; update them if needed.

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[coderabbitai]

Actionable comments posted: 1

🧹 Nitpick comments (2)

docs/chapter4/2input.md (2)

176-183: Minor copy-editing for clarity & consistency

“Stabilize floating inputs by forcing them to a known logic level” is clear, but the paragraph could flow better and the property list should use consistent casing/back-ticks.

-A **Pull Resistor** is a passive circuit element used to stabilize floating inputs by forcing them to a known logic level — either logic high (`1`) or logic low (`0`) — when no active signal is driving the line.
+The **Pull Resistor** is a passive element that keeps undriven (floating) inputs at a defined logic level—logic high (`1`) for *pull-up* or logic low (`0`) for *pull-down*—when no active signal is present.
@@
-> Properties that can be customized in the **PROPERTIES** panel include: `pullDirection`, `Direction`
+> **Properties (in the PROPERTIES panel)**  
+> • `pullDirection` – *Pull-Up* / *Pull-Down*  
+> • `direction` – rotation of the symbol

---

199-203: Use list formatting for property options to improve readability

Enumerating the pull-direction options inside a bullet list renders better and avoids long wrapped sentences.

-The `pullDirection` property allows users to choose between:
-- `Pull-Up` (sets floating input to `1`)
-- `Pull-Down` (sets floating input to `0`)
+`pullDirection` options:  
+• **Pull-Up** – sets a floating node to `1`  
+• **Pull-Down** – sets a floating node to `0`

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 9d37221 and f2b0eae.

⛔ Files ignored due to path filters (1)

• static/img/img_chapter4/4.27.png is excluded by !**/*.png

📒 Files selected for processing (1)

• docs/chapter4/2input.md (2 hunks)

[coderabbitai]

⚠️ Potential issue

Fix the broken list ordering to keep navigation anchors predictable

The manual numbering jumped from 6 → 8 → 7 → 9 after adding “Random” and “Pull Resistor”.
This breaks the logical sequence and can confuse readers (and some Markdown renderers).

-8. [Random](#random)
-7. [Counter](#counter)
-9. [Pull Resistor](#pull-resistor)
+7. [Random](#random)
+8. [Counter](#counter)
+9. [Pull Resistor](#pull-resistor)

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	8. [Random](#random)
	7. [Counter](#counter)
	9. [Pull Resistor](#pull-resistor)
	7. [Random](#random)
	8. [Counter](#counter)
	9. [Pull Resistor](#pull-resistor)

🤖 Prompt for AI Agents

In docs/chapter4/2input.md around lines 17 to 19, the numbered list is out of
order, jumping from 6 to 8, then 7, and 9, which disrupts the logical sequence.
Fix this by renumbering the list items in correct ascending order to maintain
predictable navigation anchors and ensure consistent rendering across Markdown
processors.