refactor(ts): migrate config module to use TS and ESM

[jescalada]

This PR builds on my previous refactoring PR (#27) to migrate /src/config files to TS and ESM. I modified the logic in src/config/file.ts to work with ESM imports. When using get/set exports, these don't actually refresh unless explicitly exporting the desired variable (in this case, configFile).

*Note: * I investigated the ERR_REQUIRE_ESM error in the CI, which for some reason, works just fine when executing npm run test-coverage-ci locally. Apparently, this is expected when mixing ESM and CommonJS code in the same module. Source

*Note 2: * My fix for the CI issues with ESM/TS was simply removing the dependency with the parent package (by copying the line where the environment variables are fetched). We might face the issue again when migrating the CLI to ESM/TS (if this is a priority).

Changelog

• Refactor /src/config/ to use TS and ESM
• Fix various CI issues that were missing in previous PRs

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

❌ Patch coverage is 70.27027% with 55 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@585cda6). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/db/file/pushes.ts	48.48%	17 Missing ⚠️
src/db/file/repo.ts	57.89%	16 Missing ⚠️
src/db/index.ts	40.74%	11 Missing and 5 partials ⚠️
src/db/file/users.ts	77.77%	4 Missing ⚠️
src/config/file.ts	83.33%	2 Missing ⚠️
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #31   +/-   ##
=======================================
  Coverage        ?   50.99%           
=======================================
  Files           ?       48           
  Lines           ?     1655           
  Branches        ?       81           
=======================================
  Hits            ?      844           
  Misses          ?      794           
  Partials        ?       17           

☔ 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.

[jescalada]

PR contents merged in finos#960.