feat!: use PluginManager

[erisu]

Use Cordova-Common's PluginManager instead of Browser's custom logic

Description

• Cleaned plugin add and remove APIs to use cordova-common PluginManager.
• Updated handlers API signature to match other platforms.
• PluginManager to handle writting the plugin module.
• Updated Tests

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

[codecov-commenter]

Codecov Report

❌ Patch coverage is 59.91379% with 93 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.39%. Comparing base (febc52d) to head (e5cb8e5).

Files with missing lines	Patch %	Lines
lib/Api.js	7.69%	36 Missing ⚠️
lib/BrowserProject.js	62.96%	30 Missing ⚠️
lib/browser_handler.js	42.55%	27 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #163      +/-   ##
==========================================
+ Coverage   62.27%   69.39%   +7.12%     
==========================================
  Files           7        8       +1     
  Lines        1185     1049     -136     
==========================================
- Hits          738      728      -10     
+ Misses        447      321     -126     

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