Monorepo: consolidate 7 repos into one

Combines shared, blog, market, cart, events, federation, and account
into a single repository. Eliminates submodule sync, sibling model
copying at build time, and per-app CI orchestration.

Changes:
- Remove per-app .git, .gitmodules, .gitea, submodule shared/ dirs
- Remove stale sibling model copies from each app
- Update all 6 Dockerfiles for monorepo build context (root = .)
- Add build directives to docker-compose.yml
- Add single .gitea/workflows/ci.yml with change detection
- Add .dockerignore for monorepo build context
- Create __init__.py for federation and account (cross-app imports)

market/bp/market/routes.py

@@ -0,0 +1,49 @@
+from __future__ import annotations
+
+from quart import Blueprint, g, render_template, make_response, url_for
+
+
+from ..browse.routes import register as register_browse_bp
+
+from .filters.qs import makeqs_factory
+from ..browse.services.nav import get_nav
+from ..api.routes import products_api
+from .admin.routes import register as register_admin
+
+
+
+def register(url_prefix, title):
+  bp = Blueprint("market", __name__, url_prefix)
+
+  @bp.before_request
+  def route():
+    g.makeqs_factory = makeqs_factory
+
+  
+  @bp.context_processor
+  async def inject_root():
+    market = getattr(g, "market", None)
+    market_id = market.id if market else None
+    post_data = getattr(g, "post_data", None) or {}
+    return {
+      **post_data,
+      "market_title": market.name if market else title,
+      "categories": (await get_nav(g.s, market_id=market_id))["cats"],
+      "qs": makeqs_factory()(),
+      "market": market,
+    }
+
+  bp.register_blueprint(
+    register_browse_bp(),
+  )
+  bp.register_blueprint(
+    products_api,
+  )
+  bp.register_blueprint(
+    register_admin(),
+  )
+
+  
+  
+  return bp
+