feat: everything up to bluetooth scanning

DesignRequirements.md

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+# abawo Bluetooth Device App
+
+This app is used for connecting to, configuring, and interacting with 
+abawo Bluetooth devices, such as the abawo Universal Shifters.
+
+## Features
+
+- See all connected devices
+- Add devices (connect)
+- Remove devices
+- Configure devices
+
+
+### Supported Devices
+
+- abawo Universal Shifters (only one for now)
+    - Description: Universal Shifter Device for Smart Trainers. Basically a proxy between
+      smart trainer and fitness app, that allows the smart trainer to connect to the fitness app, intercept simulation packets, and modify them to allow gear shifting.
+    
+    - Functions (app): Connect to device, scan other BT devices and send ID to device to establish
+      connection with smart trainer, send configuration to device (such as resistance calc
+      variant, and gears and such).
+    
+
+
+
+## Tech Stack
+
+- Flutter
+- Riverpod
+- GoRouter
+- flutter_blue_plus
+- shared_preferences
+
+
+## Visual Design
+
+Sleek, modern. Dark and light theme supported. Rounded containers, somewhat glass-like.
+Still mostly material design. 
+
+### Company Color Theme
+todo
+