Implement searching documentation files

[joulev]

There is a search bar in documentation pages. This branch will try to implement it.

[codecov]

Codecov Report

Merging #208 (95c981e) into documentation (ed80e06) will decrease coverage by 0.85%.
The diff coverage is 100.00%.

@@                Coverage Diff                @@
##           documentation     #208      +/-   ##
=================================================
- Coverage          96.49%   95.63%   -0.86%     
=================================================
  Files                 38       39       +1     
  Lines                884      871      -13     
  Branches             180      179       -1     
=================================================
- Hits                 853      833      -20     
- Misses                28       34       +6     
- Partials               3        4       +1     

Impacted Files	Coverage Δ
client/components/docs/navbar.tsx	100.00% <100.00%> (ø)
client/components/docs/sidebarlink.tsx	100.00% <100.00%> (ø)
client/lib/docsSearch.ts	100.00% <100.00%> (ø)
client/lib/documentation.ts	100.00% <100.00%> (ø)
server/utils/crud/commentUtils.ts	85.36% <0.00%> (-13.42%)	⬇️
server/utils/crud/pageUtils.ts	98.76% <0.00%> (+2.76%)	⬆️

[joulev]

1. Note that this PR will merge to documentation and not to main since in main we don't have much documentation to search yet.
2. If you feel like doing so, you can transfer this to server (since this is executed on the server, after all), and/or reimplement/modify it to make it more efficient/...