Add debug impl for RouterBaseProps

[mc1098]

Missing debug after #441 added by #434.

I noticed this because the website failed to build.

[codecov]

Codecov Report

Merging #442 (310c0e1) into master (c8deaee) will decrease coverage by 0.11%.
The diff coverage is 68.00%.

@@            Coverage Diff             @@
##           master     #442      +/-   ##
==========================================
- Coverage   64.69%   64.58%   -0.12%     
==========================================
  Files          52       52              
  Lines        8348     8400      +52     
==========================================
+ Hits         5401     5425      +24     
- Misses       2947     2975      +28     

Impacted Files	Coverage Δ
website/src/versions.rs	0.00% <ø> (ø)
packages/sycamore-router/src/router.rs	25.17% <9.09%> (-1.83%)	⬇️
packages/sycamore-router/src/lib.rs	96.95% <95.74%> (+0.18%)	⬆️
packages/sycamore-macro/src/view/ir.rs	100.00% <100.00%> (ø)
packages/sycamore-router-macro/src/route.rs	89.76% <100.00%> (+0.34%)	⬆️

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[lukechu10]

Thanks!