feat: FileInput and FileTokenGroup

[katiegeorge]

Description

Related links, issue #, if available: n/a

How has this been tested?

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 86.55914% with 25 lines in your changes missing coverage. Please review.

Project coverage is 96.15%. Comparing base (35a8b43) to head (7f94b5f). Report is 139 commits behind head on main.

Files with missing lines	Patch %	Lines
src/file-dropzone/internal.tsx	38.88%	9 Missing and 2 partials :warning:
src/file-input/internal.tsx	87.87%	4 Missing :warning:
src/test-utils/dom/file-token-group/index.ts	85.71%	4 Missing :warning:
src/file-token-group/file-token.tsx	88.00%	3 Missing :warning:
src/file-token-group/thumbnail.tsx	25.00%	3 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2846      +/-   ##
==========================================
- Coverage   96.17%   96.15%   -0.03%     
==========================================
  Files         759      768       +9     
  Lines       21364    21597     +233     
  Branches     7307     7316       +9     
==========================================
+ Hits        20547    20766     +219     
- Misses        763      776      +13     
- Partials       54       55       +1     

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