Add more fields to imap_filter

[angelnu]

I added the missing rcpts and address as in the check commands. This helps me to filter based on the original recipe of the email which I expect to change less than the sender.

[angelnu]

@foxcpp - I copied the code for rcpts and therefore it uses new-line separators. Maybe we prefer commas as for the aliases?

[codecov-commenter]

Codecov Report

Merging #449 (7a06fa2) into master (dca3eb7) will decrease coverage by 0.02%.
The diff coverage is 15.78%.

@@            Coverage Diff             @@
##           master     #449      +/-   ##
==========================================
- Coverage   54.15%   54.13%   -0.03%     
==========================================
  Files         123      123              
  Lines       10333    10343      +10     
==========================================
+ Hits         5596     5599       +3     
- Misses       4107     4115       +8     
+ Partials      630      629       -1     

Flag	Coverage Δ
integration	34.95% <15.78%> (-0.03%)	⬇️
unit	55.20% <0.00%> (+0.02%)	⬆️

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Impacted Files	Coverage Δ
internal/imap_filter/command/command.go	1.96% <0.00%> (-0.19%)	⬇️
internal/imap_filter/group.go	5.88% <0.00%> (ø)
internal/storage/imapsql/delivery.go	33.76% <60.00%> (+0.87%)	⬆️
internal/target/remote/security.go	56.88% <0.00%> (+0.61%)	⬆️

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[foxcpp]

Manually merged into dev branch as d60ce83. Thanks a lot for your work!