feat!: support mixed params in same path segment

[pi0]

Resolves #11
Resolves #42

This feature allows to combine more advanced URL patterns such as /files/:category/:id,name:name.txt to be able to mix and match multiple static and dynamic params in same segment (/files/test/123,name=foobar.txt" should match to { category: "test", id: "123", name: "foobar" }).

The breaking change is that param name should be strict a-zA-Z0-9_ only not accepting . in it and : in between anymore.

Also since we introduced new MIXED type, it should be applied if any library like nuxt and nitro was translating patterns to other platforms, to have it in mind that a mixed segment not essentially starting with : but can have it in between.

Implementation also requires String.prototype.matchAll support compatibility. (i am open to adding polyfill in later releases if there was a platform absolutely cannot have it now.

[codecov]

Codecov Report

Merging #52 (c3aa794) into main (0202d4c) will increase coverage by 0.22%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
+ Coverage   95.41%   95.63%   +0.22%     
==========================================
  Files           4        4              
  Lines         414      435      +21     
  Branches       75       83       +8     
==========================================
+ Hits          395      416      +21     
  Misses         19       19              

Files	Coverage Δ
src/router.ts	100.00% <100.00%> (ø)
src/types.ts	100.00% <100.00%> (ø)