Add 'json' as a new special formatter for list (New)

[Hook25]

Description

Often we want list to expose some data that then we query and modify via grep/sed, this is not a great way to go about it and we would prefer using jq (especially because --format is hard to use effectively). This adds the possibility to do it.

Resolved issues

N/A

Documentation

Help string was updated

Tests

The addition (and the printer itself) was updated.

To test this run: (this will list all jobs)

checkbox-cli list 'job' --format=json --attrs | jq 

To test this run: (this will list all manifests)

checkbox-cli list 'manifest entry' --format=json --attrs | jq 

Small additional proof of this working:

• all jobs

(venv)  checkbox-ng (list_json) >  checkbox-cli list all-jobs | grep "id: " | wc -l 
1462
(venv)  checkbox-ng (list_json) >  checkbox-cli list all-jobs -f json --attrs | jq ".[] | .id"   | wc -l
1462

• jobs

(venv)  checkbox-ng (list_json) >  checkbox-cli list job  | wc -l
1119
(venv)  checkbox-ng (list_json) >  checkbox-cli list job -f json --attrs | jq ".[] | .id"   | wc -l
1119

template:

(venv)  checkbox-ng (list_json) >  checkbox-cli list template -f json --attrs | jq ".[] | .id"   | wc -l
343
(venv)  checkbox-ng (list_json) >  checkbox-cli list template  | wc -l
Skipped file: /home/h25/prj/canonical/checkbox/metabox/metabox/metabox-provider/units/some.yaml
343

manifest entry

(venv)  checkbox-ng (list_json) >  checkbox-cli list "manifest entry" -f json --attrs | jq ".[] | .id"   | wc -l
98
(venv)  checkbox-ng (list_json) >  checkbox-cli list "manifest entry"  | wc -l
98

[codecov]

Codecov Report

Attention: Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 49.17%. Comparing base (bf5da28) to head (c769030).
Report is 142 commits behind head on main.

Files with missing lines	Patch %	Lines
checkbox-ng/checkbox_ng/launcher/subcommands.py	85.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1711      +/-   ##
==========================================
+ Coverage   49.12%   49.17%   +0.04%     
==========================================
  Files         372      372              
  Lines       40338    40353      +15     
  Branches     6809     6813       +4     
==========================================
+ Hits        19816    19843      +27     
+ Misses      19799    19784      -15     
- Partials      723      726       +3     

Flag	Coverage Δ
checkbox-ng	∅ <85.00%> (∅)

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[pieqq]

Awesome stuff!

It's going to be really helpful, very soon :D