fix(text): inline title case mapping to avoid JSON import attribute

[tomas-zijdemans]

Fixes: #7128

When Vite resolves @std/text/unstable-to-title-case, it follows that import to JSR and ends up requesting https://jsr.io/@std/text/1.0.18/title_case_mapping.json?import. The catch: hitting that URL in an HTTP client returns the JSR registry's HTML browse page for the file, not the raw JSON

Vite no longer needs to fetch a .json file from JSR when bundling @std/text/unstable-to-title-case, so the builtin:vite-json "expected value at line 1 column 1" crash from #7128 goes away. No public API change.

PS: There are other cases like this in the code as well, but not many

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.62%. Comparing base (a496da2) to head (42c51c1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7129      +/-   ##
==========================================
+ Coverage   94.61%   94.62%   +0.01%     
==========================================
  Files         634      635       +1     
  Lines       51801    51938     +137     
  Branches     9329     9329              
==========================================
+ Hits        49011    49148     +137     
  Misses       2216     2216              
  Partials      574      574              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[timreichen]

Isn't that more a vite or jsr bug than a std problem? Shouldn't this be resolved by a request content-type: application/json for example so the correct data gets returned?
I think std should be able to import json files as intended by the import api.

[tomas-zijdemans]

Isn't that more a vite or jsr bug than a std problem? Shouldn't this be resolved by a request content-type: application/json for example so the correct data gets returned? I think std should be able to import json files as intended by the import api.

Fair point. This is a practical change in std, but the better fix would likely be in the vite json plugin (if possible)

[lunadogbot]

Rename to _title_case_mapping.ts keeps the underscore-private convention (matches _title_case_util.ts); Record<string, string> + Object.entries(...) preserves the existing Map<string,string> shape; generator emits the same header + entry format used in the hand-checked-in file (new Date().getFullYear() keeps the year auto-rolling). text/deno.json never exported the JSON, so no JSR-surface change.

• nit: no test asserts the inlined data itself — toTitleCase coverage exercises the mapping indirectly. Probably overkill given the generator is the source of truth.

[lunadogbot]

@bartlomieju this is ready to merge