fix: 'compile --watch' not watching for correct file based on format

[luludan]

Currently the --watch option for compile only works for po format. This is because the file extension matches the format.

For other format options like minimal then currently the watcher is looking for files with a .minimal extension rather than a .json extension.

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[codecov]

Codecov Report

Merging #1088 (f6fdd0e) into main (cee63c4) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1088   +/-   ##
=======================================
  Coverage   82.30%   82.30%           
=======================================
  Files          56       56           
  Lines        1678     1678           
  Branches      458      458           
=======================================
  Hits         1381     1381           
  Misses        173      173           
  Partials      124      124           

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[semoal]

Looks good, nice catch! I'll release it tomorrow probably. Thanks for the contribution mate