Tree: Refactor code organization

Move common functions into their own folder and refactor the backends
to use their own folder as well.

Also cleanup imports and alphabetize import statments themselves.

Finally, move colab and docker into their own folders as well.

Signed-off-by: kingbri <bdashore3@proton.me>

docker/docker-compose.yml

@@ -0,0 +1,20 @@
+version: '3.8'
+services:
+  tabbyapi:
+    build:
+      context: ..
+      dockerfile: ./docker/Dockerfile
+    ports:
+      - "5000:5000"
+    environment:
+      - NAME=TabbyAPI
+      - NVIDIA_VISIBLE_DEVICES=all
+    volumes:
+      - ./models:/usr/src/app/models
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: all
+              capabilities: [gpu]