Handle QuotaExceededError in StyleStore (#1253)

## Launch Checklist

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When localStorage is full you start getting a "QuotaExceededError".
RIght now Maputnik does not handle this situation gracefully, it just
fails loading the style with a non-descriptive error message.

This PR purges localStorage and tries again when this particular error
happens.

It still does not show a descriptive error message. If you try to load a
style that is larger than what localStorage can handle, it will still
fail with a non-descriptive error message.

Increased the size of `example-style.json` so that it causes a
QuotaExceededError when running the regression test (try it before and
after this PR).


 - [x] Briefly describe the changes in this PR.
 - [x] Link to related issues. N/A
- [x] Include before/after visuals or gifs if this PR includes visual
changes. N/A
 - [x] Write tests for all new functionality.
 - [x] Add an entry to `CHANGELOG.md` under the `## main` section.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -11,6 +11,7 @@
 - Upgrade to MapLibre LG JS v5
 - Upgrade Vite 6 and Cypress 14 ([#970](https://github.com/maplibre/maputnik/pull/970))
 - Upgrade OpenLayers from v6 to v10
+- When loading a style into localStorage that causes a QuotaExceededError, purge localStorage and retry
 - _...Add new stuff here..._
 
 ### 🐞 Bug fixes