rpi: switch default autofocus mode to 'continuous'

[aler9]

No description provided.

[codecov]

Codecov Report

Merging #2591 (650ec15) into main (cde1909) will decrease coverage by 0.03%.
Report is 3 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2591      +/-   ##
==========================================
- Coverage   59.85%   59.83%   -0.03%     
==========================================
  Files         145      145              
  Lines       15530    15525       -5     
==========================================
- Hits         9296     9289       -7     
- Misses       5591     5594       +3     
+ Partials      643      642       -1     

Files	Coverage Δ
internal/conf/path.go	34.68% <100.00%> (ø)

... and 4 files with indirect coverage changes

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