feat(routing/http/client): DefaultProtocolFilter for IPIP-484

[lidel]

This PR makes routing/http/client initialize with implicit default protocol filter from IPIP-484 set to unknown + transport-bitswap, matching what we explicitly set in Kubo (ipfs/kubo#10534) and Rainbow (ipfs/rainbow#173).

Rationale

boxo users can change or disable default filter via WithProtocolFilter option, but the default should be filter that is optimized for golden path, which currently means bitswap. Processing peers that we know only support unsupported protocols is wasting resources and we should skip them.

Over time, we may add new protocols like http to boxo, and we will also adjust the default list accordingly.

TODO

• refactor routing/http/client to use DefaultProtocolFilter
• refactor examples/routing/delegated-routing-client to reflect implicit defaults

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.29%. Comparing base (08fb71d) to head (aa7b76a).
Report is 1 commits behind head on main.

@@           Coverage Diff           @@
##             main     #689   +/-   ##
=======================================
  Coverage   60.29%   60.29%           
=======================================
  Files         243      243           
  Lines       31018    31019    +1     
=======================================
+ Hits        18702    18704    +2     
  Misses      10649    10649           
+ Partials     1667     1666    -1     

Files with missing lines	Coverage Δ
routing/http/client/client.go	70.83% <100.00%> (+0.08%)	⬆️

... and 11 files with indirect coverage changes