Update Homebrew Documentation with functional example for markdown asset

[SamuelCochrane]

The current version of the "Rulesets and Homebrew" wiki page has the following example

---
type: asset
---

# Asset name (Asset path)

Once you write an asset... (this optional paragraph becomes the "requirement")

## Abilities

* [x] This is a default checked ability.
* [ ] This is a default unchecked ability.
* [ ] Right now abilities aren't parsed for anything (so, e.g., you can't currently embed custom asset moves)

## Controls

* health (condition meter, max: 3)
  * weakened (checkbox, is_impact: true)

## Options

* pen name (text)

This, after testing by importing into my vault, appears not to compile. There's no error in the homebrew inspector, but the asset does not show up as an option.
After testing the issue appears to be the Controls section (the asset compiles if it's removed).
Specifically, health (condition meter, max: 3) should be Health (condition_meter, max: 3), which I figured out works after trying to import the custom asset from the test vault.

My request

• update the markdown asset docs with the change to the health meter
• update the same section with examples of what "All other frontmatter properties" are. I found from the community that name and category can be added to the YAML header, any other fields?
• update the homebrew inspector to alert when there's an issue with the Controls section