feat!: support multiple entries with same route

[pi0]

Resolves #57

(context: workerd on it as part of h3 refactors to use rou3 as middleware matcher)

Previously we were only supporting one handler for each route (/foo/:bar and /foo/* are the same).

This change changes the store to an array and return type of find to an array.

perf

overhead is < %5

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (a293f3b) to head (38669fd).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #118   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          299       303    +4     
  Branches        93        93           
=========================================
+ Hits           299       303    +4     

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