feat: add listTarget api

[erisu]

Platforms affected

n/a

Motivation and Context

Support calling for listTarget on the PlatformAPI.

Will be used by Cordova CLI/Lib 12

Description

Added listTargets on platform api and added supporting methods in the run.js file

Testing

npm t

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[breautek]

lgtm

[codecov-commenter]

Codecov Report

Merging #1602 (a5ffb74) into master (7efe90f) will increase coverage by 0.34%.
The diff coverage is 44.82%.

@@            Coverage Diff             @@
##           master    #1602      +/-   ##
==========================================
+ Coverage   71.82%   72.17%   +0.34%     
==========================================
  Files          23       23              
  Lines        1796     1829      +33     
==========================================
+ Hits         1290     1320      +30     
- Misses        506      509       +3     

Impacted Files	Coverage Δ
lib/run.js	68.96% <40.74%> (-24.59%)	⬇️
lib/Api.js	51.80% <100.00%> (+1.18%)	⬆️

... and 2 files with indirect coverage changes

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