Support XDG config path

[synfinatic]

Fixes: #330

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.12%. Comparing base (0644b6a) to head (0a1b78e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #951      +/-   ##
==========================================
+ Coverage   83.91%   84.12%   +0.22%     
==========================================
  Files          41       42       +1     
  Lines        3014     3055      +41     
==========================================
+ Hits         2529     2570      +41     
  Misses        392      392              
  Partials       93       93              

Flag	Coverage Δ
unittests	84.12% <100.00%> (+0.22%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
internal/config/config.go	100.00% <100.00%> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0644b6a...0a1b78e. Read the comment docs.