feat(http): unify extractor and predicate APIs for 0.3

[singulared]

Introduce Config-based API for extractors and Into shorthands for predicates, making the API more ergonomic and consistent. closes #88

Extractors:

• Add extractor() entry point function
• Add Config types: MethodConfig, PathConfig, VersionConfig, HeaderConfig, QueryConfig, BodyConfig
• Rename PathConfig::new() to PathConfig::pattern()
• Re-export extension traits from extractors module

Predicates:

• Add Into implementations for direct value usage
• Allow .method(Method::GET) instead of .method(method::Operation::eq(...))
• Allow .status(StatusCode::OK) instead of .status(status::Operation::eq(...))

Breaking changes documented in hitbox-http/MIGRATION.md

[codecov]

Codecov Report

❌ Patch coverage is 46.38158% with 163 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.78%. Comparing base (93121a6) to head (ca2faa9).
⚠️ Report is 12 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
hitbox-http/src/extractors/body.rs	8.62%	53 Missing ⚠️
hitbox-http/src/predicates/header/operation.rs	0.00%	23 Missing ⚠️
hitbox-http/src/extractors/header.rs	56.25%	14 Missing ⚠️
hitbox-http/src/extractors/query.rs	56.25%	14 Missing ⚠️
hitbox-configuration/src/config.rs	0.00%	10 Missing ⚠️
hitbox-http/src/predicates/body/operation.rs	0.00%	10 Missing ⚠️
hitbox-http/src/predicates/response/status.rs	60.86%	9 Missing ⚠️
hitbox-http/src/predicates/request/path.rs	57.14%	6 Missing ⚠️
hitbox-http/src/predicates/request/query.rs	64.70%	6 Missing ⚠️
hitbox-http/src/extractors/mod.rs	0.00%	3 Missing ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #202      +/-   ##
==========================================
- Coverage   80.18%   78.78%   -1.41%     
==========================================
  Files         111      113       +2     
  Lines        7394     7594     +200     
==========================================
+ Hits         5929     5983      +54     
- Misses       1465     1611     +146     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.