improvement: improve logs and recording messages

[frenata]

1. For recording, make the "R" blink and turn red when recording.
2. For logging, instead of stderr (which makes the user redirect), output logs to a file with tracing-appender
3. For FIT files, use a config directory

Closes: #26
Closes: #29

[codecov]

Codecov Report

❌ Patch coverage is 58.62069% with 36 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.02%. Comparing base (5d8bf29) to head (d399a7a).
⚠️ Report is 2 commits behind head on trunk.

Files with missing lines	Patch %	Lines
src/bin/suffice/app.rs	47.36%	20 Missing ⚠️
src/config.rs	42.10%	11 Missing ⚠️
src/bin/suffice/main.rs	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk      #42      +/-   ##
==========================================
- Coverage   78.69%   78.02%   -0.68%     
==========================================
  Files           7        8       +1     
  Lines         798      851      +53     
==========================================
+ Hits          628      664      +36     
- Misses        170      187      +17     

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