add Tamil Mirador translation

[Natkeeran]

Adds a Tamil Mirador translation following this guide: https://github.com/ProjectMirador/mirador/blob/main/src/locales/README.md

Translations were contributed by Ushanthy Gowthaman from UofT Scarborough Library.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.9%. Comparing base (ab59ae0) to head (b9f5692).
⚠️ Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #4275     +/-   ##
=======================================
+ Coverage   92.9%   92.9%   +0.1%     
=======================================
  Files        335     335             
  Lines       5530    5538      +8     
  Branches    1956    1960      +4     
=======================================
+ Hits        5135    5143      +8     
  Misses       348     348             
  Partials      47      47             

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[marlo-longley]

@Natkeeran -- thank you for contributing this!

[marlo-longley]

I approved this too early.
In testing I realized, in order for this work to be available we need to register the translation.

You need to modify this file in 2 places
https://github.com/ProjectMirador/mirador/blob/ab59ae0d7ac974dfee26a791fcc7f310e8d28733/src/i18n.js

1. after line 24, import your new file
   import ta from './locales/ta/translation.json';
2. after line 52, register the resource, by adding ta

With that fix in place I get the translations!

[Natkeeran]

Thank you @marlo-longley

I've register the translation as noted above.

[marlo-longley]

Looks great, thanks @Natkeeran!