feat!: Implement Serialize, Deserialize, and JsonSchema implementations for cot internal types

[ElijahAhianyo]

Related issue or discussion

This should allow the use of cot's internal types in structs where schemas::JsonSchema is derived:

#[derive(Debug, Clone, Serialize, schemars::JsonSchema)]
struct Foo {
  id: Auto<i64>,
  limited_str: LimitedString<128>,
  fk: ForeignKey<Bar>,
  email: Email,
  url: Url
}

Description

Type of change

• Bug fix
• New feature
• Documentation
• Refactor / cleanup
• Performance improvement
• Other (describe above)

Checklist

• I've read the contributing guide
• Tests pass locally (just test-all)
• Code passes clippy (just clippy)
• Code is properly formatted (cargo fmt)
• New tests added (regression test for bugs, coverage for new features)
• Documentation (both code and site) updated (if applicable)

[github-actions]

Bencher Report

Branch	elijah/json-impls
Testbed	github-ubuntu-latest

Click to view all benchmark results

Benchmark	Latency	Benchmark Result microseconds (µs) (Result Δ%)	Upper Boundary microseconds (µs) (Limit %)
empty_router/empty_router	📈 view plot 🚷 view threshold	5,693.40 µs (-6.85%) Baseline: 6,112.09 µs	7,646.01 µs (74.46%)
json_api/json_api	📈 view plot 🚷 view threshold	1,013.50 µs (-5.71%) Baseline: 1,074.84 µs	1,313.26 µs (77.17%)
nested_routers/nested_routers	📈 view plot 🚷 view threshold	981.35 µs (-1.09%) Baseline: 992.18 µs	1,196.13 µs (82.04%)
single_root_route/single_root_route	📈 view plot 🚷 view threshold	957.55 µs (+0.33%) Baseline: 954.43 µs	1,158.71 µs (82.64%)
single_root_route_burst/single_root_route_burst	📈 view plot 🚷 view threshold	16,880.00 µs (-4.58%) Baseline: 17,690.89 µs	21,192.85 µs (79.65%)

🐰 View full continuous benchmarking report in Bencher

[codecov]

Codecov Report

❌ Patch coverage is 74.76636% with 27 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cot/src/openapi.rs	84.21%	15 Missing ⚠️
cot/src/db.rs	0.00%	12 Missing ⚠️

Flag	Coverage Δ
rust	90.00% <74.76%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
cot/src/common_types.rs	69.11% <ø> (ø)
cot/src/db.rs	84.62% <0.00%> (-1.55%)	⬇️
cot/src/openapi.rs	93.29% <84.21%> (-1.47%)	⬇️

... and 1 file with indirect coverage changes

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