feat: added rgb led matrix documentation

[Audatic07]

Fixes #515

Ref #

Changes done:

• Task 1: Added missing documentation of RGB LED Matrix.

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
  • Added a new public "RGB Led Matrix" section describing a 24‑bit color pixel matrix and three pixel‑setting methods.
  • Documents color packing format with example color calculations.
  • Details configurable properties (rows, columns, LED size, grid toggle) and usage tips.
  • Appended the section to the Output index as item 9 and included an embedded interactive simulator.

[coderabbitai]

Walkthrough

Adds a new navigation item "RGB LED Matrix" (item 9) to the Output index and appends a public documentation section titled "RGB Led Matrix" to docs/chapter4/3output.md after the SixteenSegDisplay section. The section documents the matrix as a 24‑bit color pixel array, describes three pixel-setting methods, specifies color packing (R: top 8 bits, G: middle 8 bits, B: low 8 bits) with example calculations, lists mutable properties (Rows, Columns, LED Size, Toggle Grid), provides usage tips, and embeds a simulator iframe. No exported/public entity declarations were changed.

🚥 Pre-merge checks | ✅ 5 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Merge Conflict Detection	⚠️ Warning	⚠️ Unable to check for merge conflicts: Invalid branch name format

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The pull request title accurately summarizes the main change—adding RGB LED Matrix documentation—and is clear and concise.
Linked Issues check	✅ Passed	The pull request successfully implements the documented requirement from issue #515 by adding comprehensive RGB LED Matrix documentation to the output page.
Out of Scope Changes check	✅ Passed	All changes in the pull request are directly related to adding RGB LED Matrix documentation, with no unrelated modifications introduced.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

🧪 Generate unit tests (beta)

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

⚔️ Resolve merge conflicts (beta)

• Auto-commit resolved conflicts to branch rgbleddoc#515
• Post resolved changes as copyable diffs in a comment

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@docs/chapter4/3output.md`:
- Line 19: Update the inconsistent capitalization by changing every occurrence
of "RGB Led Matrix" to "RGB LED Matrix" (specifically the navigation item text
"[RGB Led Matrix](`#rgb-led-matrix`)" and the section header currently at line
203), and ensure the header text and its anchor/link are consistent (update any
corresponding anchor/ID or link text if your markdown generator derives anchors
from the header).

🧹 Nitpick comments (2)

docs/chapter4/3output.md (2)

232-232: Align iframe formatting with existing sections.

The iframe embed uses a different style (width/height 500, extra attributes like style, name, frameborder, marginheight, marginwidth) compared to other iframes in this file, which consistently use width="600px" height="400px" with minimal attributes. Consider standardizing for consistency.

♻️ Proposed refactor to match existing iframe pattern

-<iframe src="https://circuitverse.org/simulator/embed/rgbled-ad6e513a-6174-4d30-bd4b-a97b8934950b?theme=&display_title=false&clock_time=true&fullscreen=true&zoom_in_out=true" style="border-width:; border-style: ; border-color:;" name="myiframe" id="projectPreview" scrolling="no" frameborder="1" marginheight="0px" marginwidth="0px" height="500" width="500" allowFullScreen></iframe>
+<iframe
+  width="600px"
+  height="400px"
+  src="https://circuitverse.org/simulator/embed/rgbled-ad6e513a-6174-4d30-bd4b-a97b8934950b"
+  id="projectPreview"
+  scrolling="no"
+  webkitAllowFullScreen
+  mozAllowFullScreen
+  allowFullScreen
+>
+  {" "}
+</iframe>

---

233-233: Remove temporary CI trigger comment.

The HTML comment appears to be a temporary addition to trigger CI re-runs and should be removed before merging to keep the documentation clean.

🧹 Proposed cleanup

-<!-- empty comment to rerun CI -->

[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@docs/chapter4/3output.md`:
- Line 233: Remove the temporary HTML CI trigger comment ("<!-- empty comment to
rerun CI -->") from docs/chapter4/3output.md; locate the exact line containing
that comment and delete it so the file contains no leftover development
artifact, then save and commit the change with a clear message (e.g., "chore:
remove temporary CI trigger comment").

🧹 Nitpick comments (1)

docs/chapter4/3output.md (1)

232-232: Clean up empty style attribute values.

The style attribute contains CSS properties with empty values (border-width:; border-style: ; border-color:;). This doesn't cause functional issues but reduces code quality. Consider either providing actual values or removing the style attribute entirely.

♻️ Proposed fix

-<iframe src="https://circuitverse.org/simulator/embed/rgbled-ad6e513a-6174-4d30-bd4b-a97b8934950b?theme=&display_title=false&clock_time=true&fullscreen=true&zoom_in_out=true" style="border-width:; border-style: ; border-color:;" name="myiframe" id="projectPreview" scrolling="no" frameborder="1" marginheight="0px" marginwidth="0px" height="500" width="500" allowFullScreen></iframe>
+<iframe src="https://circuitverse.org/simulator/embed/rgbled-ad6e513a-6174-4d30-bd4b-a97b8934950b?theme=&display_title=false&clock_time=true&fullscreen=true&zoom_in_out=true" name="myiframe" id="projectPreview" scrolling="no" frameborder="1" marginheight="0px" marginwidth="0px" height="500" width="500" allowFullScreen></iframe>

[Audatic07]

@Nihal4777 please review :)