v0.2.5 alpha App library update

This update focused on separating the app development from the firmware dev.
Only system apps live with the firmware now and other apps are found in the app library.
https://github.com/PhilMo6/meshpunk-apps
The app library app can be used with wifi to download apps onto your tdeck or the sd card. the sd card is recommended since the filesystem gets erased on firmware flashing.
Only the system apps are pre installed so you will have to redownload any others you want.
Themes are also downloadable from the themes settings but the preinstalled ones are all still included.
The BLE implementation was rewritten to better work with the android app.
USB keyboard and USB thumb drive support with the correct 2 in 1 powered OTG y splitter cable
Also includes a some error fixes and a security fix.