Add emulator controls to sidebar

[MrXANA91]

This PR adds a 'TreeView' in the extension sidebar to quickly get access to emulator controls, such as :

• app configuration (disabled when in DevContainer / Codespace, not properly functioning)
• battery state
• bluetooth state
• accel-tap
• time format
• timeline quick view state

Closes #2

• WorksOnMyMachine

• Test in DevContainer / Github Codespace

• Making EmuAppConfig work in Github Codespace

[MrXANA91]

Marking it as ready for review mostly for design feedback.
Checks before executing the various commands are not really handled properly, some advise needed.

Commit history can be cleaned up if needed

[MrXANA91]

Tested in codespace.

App config in browser is disabled in Codespace because the webpage tries to send settings back to a localhost socket which reaches the user's PC instead of the Codespace machine. Fixing this will need us to modify pebble-tool.
Functional in codespace in this seperate PR: #4

Marking this PR as ready for review still.

[MrXANA91]

Functional in codespace with this PR : #4

PR is separated from this one because it relies on modifications of the pebble-tool. This present PR doesn't rely on those. so it can be merged as is.

[MrXANA91]

@jplexer I am unable to request a review here, could you check this?

[jplexer]

LGTM, awesome!