* ble-glue: add on connect \ disconnect, on send \ received callbacks
* bt: rework service with furi-hal-bt and callbacks
* bt: update battery level on connect
* ble-glue: set one callback with parameters
* bt: rework callbacks, remove unused API
* ble-glue: remove dead code
* furi-hal-bt: add documentation
* ble-glue: apply changes for f7 target
* bt: rename RpcInstance -> Rpc
* ble: add disconnection reason
* ble: don't open bt record from GAP
* bt: fix RPC session close
* Assets: separate targets for icons and protobuf
Co-authored-by: あく <alleteam@gmail.com>
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