[Draft] Allow underzoom and overpan of a single-copy world

[larsmaxfield]

Launch Checklist

Draft PR to check the implications of current underzoom design. I am not currently able to run local tests.

Fixes #4510, #4591 by allowing the map to be underzoomed and overpanned:

• [Feature] Allow "underzooming" to show entire map on non-square viewports when renderWorldCopies=false #4510
• How to zoomout without phone boundary limit #4591

Explanation of current design at #4510 (comment).

Demo:

^{https://larsmaxfield.github.io/swings/maplibre-underzoom/unbounded.html}

• 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

Attention: Patch coverage is 39.80583% with 62 lines in your changes missing coverage. Please review.

Project coverage is 87.75%. Comparing base (ca4e603) to head (c12227c).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/geo/transform.ts	44.44%	30 Missing and 5 partials ⚠️
src/ui/map.ts	32.50%	27 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4733   +/-   ##
=======================================
  Coverage   87.75%   87.75%           
=======================================
  Files         247      247           
  Lines       33656    33747   +91     
  Branches     2201     2167   -34     
=======================================
+ Hits        29536    29616   +80     
- Misses       3132     3148   +16     
+ Partials      988      983    -5     

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[birkskyum]

I am not currently able to run local tests.

can you elaborate? unit tests? in case you need assistance, what do you see now when you run npm run test-unit?

The Build tests will pass if you update the expected build size to what it is now.

The Tests / Code Hygiene (pull_request), you can have it pass simply by dumping these in the docs/assets/examples folder, and name them so they match the example .html files

underzoom.png

underzoom-wide.png

underzoom-tall.png