build: just read filenames of locales

[Shinigami92]

This is an optimization separated from #1052

Instead of loading all locales while bundling, we can just read their filenames and so it don't transpile all the typescript content in memory

[codecov[bot]]

Codecov Report

Merging #1090 (85aa353) into main (f943b78) will increase coverage by 0.00%. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1090   +/-   ##
=======================================
  Coverage   99.64%   99.64%           
=======================================
  Files        2146     2146           
  Lines      230393   230393           
  Branches      979      979           
=======================================
+ Hits       229582   229583    +1     
+ Misses        790      789    -1     
  Partials       21       21           

Impacted Files	Coverage Δ
src/modules/internet/user-agent.ts	86.37% <0.00%> (-0.58%)	:arrow_down:
src/modules/finance/index.ts	100.00% <0.00%> (+0.68%)	:arrow_up:

[Shinigami92]

The way going to #1287 solves this much better, so this PR would get stale anyways