feat: add p/moul/realmpath

[moul]

Lightweight Render.path parsing and link generation library with an idiomatic API, closely resembling that of net/url.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.75%. Comparing base (4f27a57) to head (3e74dbf).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3094      +/-   ##
==========================================
- Coverage   63.77%   63.75%   -0.03%     
==========================================
  Files         548      548              
  Lines       78681    78681              
==========================================
- Hits        50180    50161      -19     
- Misses      25117    25136      +19     
  Partials     3384     3384              

Flag	Coverage Δ
contribs/gnodev	60.54% <ø> (ø)
contribs/gnofaucet	14.82% <ø> (ø)
gno.land	73.62% <ø> (ø)
gnovm	67.92% <ø> (ø)
misc/genstd	79.72% <ø> (ø)
tm2	62.38% <ø> (-0.09%)	⬇️

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[leohhhn]

lgtm 👍

Just wondering about the name, but can't think of a better one right now. I'll let you know if I get a better idea.