Implement VPN App Exclusions management view

[diegoreymendez]

Task/Issue URL: https://app.asana.com/0/0/1209150117333886/f

Description

Adds app exclusions management UI, effectively enabling app exclusions behind the feature flag.

Translations

Job is here.

Known limitations

1. Chrome requires excluding it's helper app too, which is currently not automatically handled.

Testing

Some basic testing expectations:

• The app store build should never show exclusions since they're disabled
• When the app exclusions feature flag is disabled (which is the current default), you should see the same exclusions UI that's in our release build.
• When the app exclusions feature flag is enabled (through Debug Menu > Feature Flag Overrides) you should see the new exclusions UI.

Test app exclusions work

1. Enable the app exclusions feature flag override
2. Go into Settings > VPN > App Exclusions and add an app to exclude
3. Start the VPN
4. Make sure the app traffic is excluded (if using a browser you can check you IP address).

Definition of Done:

• Does this PR satisfy our Definition of Done?

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Internal references:

Pull Request Review Checklist
Software Engineering Expectations
Technical Design Template
Pull Request Documentation

[github-actions]

	Fails
🚫	Please, make sure this PR satisfies our Definition of Done and the relevant checkbox is checked.

	Warnings
⚠️	PR has more than 500 lines of code changing. Consider splitting into smaller PRs if possible.

	Messages
📖	You seem to be updating localized strings. Make sure that you request translations and include translated strings before you ship your change. See Localization Guidelines for more information.

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[diegoreymendez]

Since I'm adding some code to retrieve information from 3rd party apps living in /Applications, I figured it would be good to modularize it into a Swift Package.