Clean up repositories: delete stale branches, add description, website and topics

As discussed in Slack this a tracking issue to cleanup and update all repositories.

1. Delete stale branches
2. Add proper descriptions
3. Add a website link (**npm? official documentation?**)
4. Add topics to GitHub

The goal should be consistency between all projects, so I guess this needs some more discussion :)

Below is the big list taken from the README of this repo:

Platforms
- [ ] cordova-android
- [ ] cordova-ios
- [ ] cordova-windows
- [ ] cordova-browser
- [ ] cordova-osx
- [ ] cordova-test-platform
- [ ] cordova-electron

Plugins
- [ ] cordova-plugin-battery-status
- [ ] cordova-plugin-camera
- [ ] cordova-plugin-device
- [ ] cordova-plugin-dialogs
- [ ] cordova-plugin-file
- [ ] cordova-plugin-geolocation
- [ ] cordova-plugin-inappbrowser
- [ ] cordova-plugin-media
- [ ] cordova-plugin-media-capture
- [ ] cordova-plugin-network-information
- [ ] cordova-plugin-screen-orientation
- [ ] cordova-plugin-splashscreen
- [ ] cordova-plugin-statusbar
- [ ] cordova-plugin-vibration
- [ ] cordova-plugin-whitelist
- [ ] cordova-plugin-wkwebview-engine
- [ ] cordova-plugins

Tooling
- [ ] cordova-cli
- [ ] cordova-plugman
- [ ] cordova-coho
- [ ] cordova-js
- [ ] cordova-lib
- [ ] cordova-common
- [ ] cordova-create
- [ ] cordova-fetch
- [ ] cordova-serve
- [ ] cordova-plugin-test-framework
- [ ] cordova-paramedic
- [ ] cordova-mobile-spec
- [ ] cordova-app-hello-world

Documentation and Website(s)
- [ ] cordova
- [ ] cordova-docs
- [ ] cordova-status

Organization / Apache
- [ ] cordova-contribute
- [ ] cordova-discuss
- [ ] cordova-apache-board-reports
- [ ] cordova-new-committer-and-pmc

Other
- [ ] cordova-node-xcode

Start with the repository list in the issue and the README it references. First establish consistent rules for stale branches, descriptions, website links, and topics across the listed repositories; the work is done when the agreed checklist is addressed consistently and the needed discussion is resolved.

Written by the indexing model from the issue text.