Reorganize repository structure for better organization

- Move backend code to swingmusic/ folder
- Move client applications to root level (swingmusic-android, swingmusic-desktop, swingmusic-webclient)
- Remove intermediate backend/ and clients/ folders
- Update README with new folder structure and setup instructions
- Clean and organized repository layout

src/swingmusic/api/home/__init__.py

@@ -1,38 +0,0 @@
-from flask_openapi3 import Tag
-from flask_openapi3 import APIBlueprint
-from pydantic import BaseModel, Field
-
-from swingmusic.api.apischemas import GenericLimitSchema
-from swingmusic.lib.home.recentlyadded import get_recently_added_items
-from swingmusic.lib.home.get_recently_played import get_recently_played
-from swingmusic.store.homepage import HomepageStore
-
-bp_tag = Tag(name="Home", description="Homepage items")
-api = APIBlueprint("home", __name__, url_prefix="/nothome", abp_tags=[bp_tag])
-
-
-@api.get("/recents/added")
-def get_recently_added(query: GenericLimitSchema):
-    """
-    Get recently added
-    """
-    return {"items": get_recently_added_items(query.limit)}
-
-
-@api.get("/recents/played")
-def get_recent_plays(query: GenericLimitSchema):
-    """
-    Get recently played
-    """
-    return {"items": get_recently_played(query.limit)}
-
-
-class HomepageItem(BaseModel):
-    limit: int = Field(
-        default=9, description="The max number of items per group to return"
-    )
-
-
-@api.get("/")
-def homepage_items(query: HomepageItem):
-    return HomepageStore.get_homepage_items(limit=query.limit)