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.

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

cypress/e2e/maputnik-driver.ts

@@ -8,8 +8,10 @@ const baseUrl = "http://localhost:8888/";
 
 const styleFromWindow = (win: Window) => {
   const styleId = win.localStorage.getItem("maputnik:latest_style");
-  const styleItem = win.localStorage.getItem(`maputnik:style:${styleId}`);
-  const obj = JSON.parse(styleItem || "");
+  const styleItemKey = `maputnik:style:${styleId}`;
+  const styleItem = win.localStorage.getItem(styleItemKey);
+  if (!styleItem) throw new Error("Could not get styleItem from localStorage");
+  const obj = JSON.parse(styleItem);
   return obj;
 };