[LFS rebase] Bluetooth Troubleshooting Updated Content (#1388)

* New folder for bluetooth images

* Updated bluetooth content

* Remove note blocks

* Added new photos

* Remove unnecessary items, correct and adjust sections, and add new photos

* fix lint errors

* Fix button formats and update Bluetooth description

* update bluetooth_2 image

* Add more info about toggling airplane mode

* Update Bluetooth enable screenshots to 24.04

* Add basic usage section

* Re-take some screenshots

* Replace incorrect Bluetooth version check

The content before would have displayed the version of the bluetoothctl utility,
not the supported Bluetooth version of the device. The new, simpler method shows
the actual Bluetooth version of the device.

* Remove incorrect info on separate antennas for WiFi & BT

* Revising & editing for accuracy & style

* Better organization of additional commands

* Update COSMIC screenshots to latest version & optimize PNGs

* Convert PNGs to WebP

* Consolidate audio tips

* Tweak kernel modules heading

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Co-authored-by: Angelo <angelo@system76.com>

Author: jacobgkau