Allow custom validators in ApiHandler

[s-fletcher]

• Deprecates ajv and schemas options inside of ApiHandler
• Allows validators to be passed in as an alternative to schemas
• Sets up all AJV logic to be wiped in next major release.
• Adds prettier settings to environment (copied from @faceteer/facet repo)

[codecov]

Codecov Report

Merging #21 (c791e8b) into main (b68b2f6) will increase coverage by 0.49%.
The diff coverage is 95.65%.

@@            Coverage Diff             @@
##             main      #21      +/-   ##
==========================================
+ Coverage   83.22%   83.72%   +0.49%     
==========================================
  Files          11       11              
  Lines         322      338      +16     
  Branches       76       78       +2     
==========================================
+ Hits          268      283      +15     
- Misses         50       55       +5     
+ Partials        4        0       -4     

Impacted Files	Coverage Δ
handlers/api-handler.ts	92.04% <95.65%> (+0.37%)	⬆️
handlers/queue-handler.ts	78.26% <0.00%> (ø)
response/failed-response.ts	80.00% <0.00%> (ø)
response/success-response.ts	69.23% <0.00%> (ø)

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[github-actions]

Unit Test Results

  1 files  ±0    4 suites  ±0   5s ⏱️ ±0s
17 tests +2  17 ✔️ +2  0 💤 ±0  0 ❌ ±0 
18 runs  +3  18 ✔️ +3  0 💤 ±0  0 ❌ ±0 

Results for commit c791e8b. ± Comparison against base commit b68b2f6.

This pull request removes 3 and adds 5 tests. Note that renamed tests count towards both.

Api Handler Api Handler Handles Invalid Requests ‑ Api Handler Api Handler Handles Invalid Requests
Api Handler Api Handler validates ‑ Api Handler Api Handler validates
Api Handler Returns a 400 on validation failures ‑ Api Handler Returns a 400 on validation failures

Api Handler Api Handler with Schemas Handles Invalid Requests ‑ Api Handler Api Handler with Schemas Handles Invalid Requests
Api Handler Api Handler with Validators Handles Invalid Requests ‑ Api Handler Api Handler with Validators Handles Invalid Requests
Api Handler Api Handler with schemas validates ‑ Api Handler Api Handler with schemas validates
Api Handler Returns a 400 on schema validation failures ‑ Api Handler Returns a 400 on schema validation failures
Api Handler Returns a 400 on validator validation failures ‑ Api Handler Returns a 400 on validator validation failures

♻️ This comment has been updated with latest results.

[s-fletcher]

The intention here is to give validators top priority if both validation methods are specified.

[bill-kerr]

Thanks for doing this! One comment on the argument type of the validate function

[bill-kerr]

Nice--thanks for making this optional. We have a few routes that don't require schemas--and passing in an empty object felt werid.

[bill-kerr]

LFG!