Add additional built-in constraints

[CathalMullan]

Considered adding support for Base64, Hex, UUID, Alpha, etc. but decided not to.

Don't want to introduce more dependencies. Any half-assed implementation would probably only cause more issues.

Maybe long term, we can have seperate features for other crates.

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #96 will degrade performances by 16.96%

_{Comparing 93-support-more-built-in-constraints (1ba7645) with main (530af10)}

Summary

⚡ 3 improvements ❌ 3 (👁 3) regressions ✅ 16 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	93-support-more-built-in-constraints	Change
⚡	matchit benchmarks/gonzales	5 µs	4.7 µs	+6.23%
👁	matchit benchmarks/matchit	5.2 µs	5.4 µs	-2.58%
⚡	matchit benchmarks/path-tree	8 µs	7.8 µs	+2.15%
⚡	matchit benchmarks/regex	19.6 µs	19 µs	+3.19%
👁	matchit benchmarks/wayfind	7.7 µs	9.3 µs	-16.96%
👁	path-tree benchmarks/wayfind	42.4 µs	45.8 µs	-7.48%

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 72.22222% with 5 lines in your changes missing coverage. Please review.

Files	Patch %	Lines
src/constraints.rs	0.00%	3 Missing :warning:
src/router.rs	86.66%	2 Missing :warning:

Files	Coverage Δ
src/router.rs	89.28% <86.66%> (+0.97%)	:arrow_up:
src/constraints.rs	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes