Make text-max-width require symbol-placement: point

[LostDragonist]

When investigating maplibre/maplibre-gl-js#4124, I noticed 'text-max-width' is not used when 'symbol-placement' is anything other than 'point'. This is an attempt to document this behavior for other users.

Relevant native code: https://github.com/maplibre/maplibre-native/blob/main/src/mbgl/layout/symbol_layout.cpp#L381
Relevant JS code: https://github.com/maplibre/maplibre-gl-js/blob/main/src/symbol/symbol_layout.ts#L159

Edit: Hmm. The docs generation doesn't actually use any requires in the form of {"propery": "value"}. So the usefulness of this is pretty minimal at that moment. /shrug.

Launch Checklist

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Link to related issues.
• Include before/after visuals or gifs if this PR includes visual changes.
• Write tests for all new functionality.
• Document any changes to public APIs.
• Post benchmark scores.
• Add an entry to CHANGELOG.md under the ## main section.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.45%. Comparing base (c6bec09) to head (5cf0c73).
Report is 3 commits behind head on main.

Additional details and impacted files

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##             main     #666   +/-   ##
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  Coverage   92.45%   92.45%           
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  Files         104      104           
  Lines        4624     4624           
  Branches     1303     1303           
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  Hits         4275     4275           
  Misses        349      349           

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[HarelM]

Is this requires field used for validating the style?
Will this break any existing styles?

Thanks for the docs generation fix BTW!

[LostDragonist]

Is this requires field used for validating the style? Will this break any existing styles?

Best I can tell, this is not used for any style validation and should not break existing styles. I tried running all sorts of styles through gl-style-validate and the "Requires X to be Y" construct doesn't appear to have any actual validation attached to it.

[HarelM]

I see, don't we plan to change this though? If we are planning on changing it I would wait with the docs update, wouldn't you?

[HarelM]

Closing, as I believe this is no longer relevant.
If this is not the case please let me know and I'll reopen it.