refactor: refactor git-proxy-cli to TS + ESM

[jescalada]

Fixes #1064.

Based on #1063.

Would love some input from folks that use the CLI! I want to make sure that everything still works as expected, particularly the build script wiring (builds into /git-proxy-cli/dist/*) and the execution from the main project.

[netlify]

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🔨 Latest commit	d6d5d95
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[codecov]

Codecov Report

Attention: Patch coverage is 61.27660% with 182 lines in your changes missing coverage. Please review.

Project coverage is 78.09%. Comparing base (75fb0e6) to head (d6d5d95).

Files with missing lines	Patch %	Lines
src/service/routes/push.ts	16.90%	58 Missing and 1 partial ⚠️
src/service/routes/repo.ts	61.03%	24 Missing and 6 partials ⚠️
src/service/routes/users.ts	20.00%	24 Missing ⚠️
src/service/passport/ldaphelper.ts	27.27%	16 Missing ⚠️
src/service/passport/oidc.ts	35.00%	13 Missing ⚠️
src/service/passport/jwtAuthHandler.ts	69.69%	4 Missing and 6 partials ⚠️
src/service/passport/activeDirectory.ts	63.15%	5 Missing and 2 partials ⚠️
src/service/passport/jwtUtils.ts	87.17%	3 Missing and 2 partials ⚠️
src/service/index.ts	90.69%	2 Missing and 2 partials ⚠️
src/service/routes/config.ts	66.66%	4 Missing ⚠️
... and 6 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1065      +/-   ##
==========================================
+ Coverage   76.78%   78.09%   +1.31%     
==========================================
  Files          55       55              
  Lines        2261     2324      +63     
  Branches      251      359     +108     
==========================================
+ Hits         1736     1815      +79     
+ Misses        495      457      -38     
- Partials       30       52      +22     

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