feat: Move all the configs to one single file

[Natoandro]

• Move all the configs to one single file
• Remove some specific configs from the global config variable and make them accessible on the Typegate instance, to improve test configurability.

Migration notes

• SYNC_REDIS_PASSWORD has been removed, can only be set on the SYNC_REDIS_URL.

• The change comes with new or modified tests

• Hard-to-understand functions have explanatory comments

• End-user documentation is updated to reflect the change

[codecov]

Codecov Report

Attention: Patch coverage is 84.83146% with 81 lines in your changes missing coverage. Please review.

Project coverage is 73.38%. Comparing base (41a84cc) to head (452769a).
Report is 2 commits behind head on main.

Files	Patch %	Lines
typegate/src/runtimes/wasm_wire.ts	0.00%	29 Missing ⚠️
typegate/src/config/loader.ts	79.06%	9 Missing ⚠️
typegate/src/config.ts	92.30%	7 Missing ⚠️
typegate/src/config/types.ts	89.85%	7 Missing ⚠️
typegate/src/services/auth/mod.ts	50.00%	7 Missing ⚠️
typegate/src/services/auth/protocols/oauth2.ts	82.35%	3 Missing ⚠️
typegate/src/typegate/mod.ts	85.00%	3 Missing ⚠️
typegate/tests/utils/query/rest_query.ts	57.14%	3 Missing ⚠️
typegate/src/log.ts	50.00%	2 Missing ⚠️
typegate/src/runtimes/typegate.ts	33.33%	2 Missing ⚠️
... and 6 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #733      +/-   ##
==========================================
- Coverage   73.40%   73.38%   -0.03%     
==========================================
  Files         115      117       +2     
  Lines       14027    14143     +116     
  Branches     1416     1410       -6     
==========================================
+ Hits        10297    10379      +82     
- Misses       3704     3738      +34     
  Partials       26       26              

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[Yohe-Am]

Good diff.