Move tavolo-app under packages/ for a uniform monorepo layout

Relocate the composition root (app, config, static, logging_config,
aerich_config) from server/src/tavolo/ to
packages/tavolo-app/src/tavolo/, with its own pyproject.toml and README
like the sibling distributions. Module paths and the granian entrypoint
are unchanged.

server/pyproject.toml remains as a tooling shim ([tool.aerich] next to
./migrations, [tool.mypy] for runs from server/); the Dockerfile installs
all three distributions from ./packages. Verified: all suites green,
mypy clean per package, aerich resolves the moved config identically,
wheel builds.

server/packages/tavolo-app/pyproject.toml

@@ -0,0 +1,47 @@
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "tavolo-app"
+version = "0.1.0"
+description = "Tavolo multiplayer card-game application: platform + scopone game wiring"
+readme = "README.md"
+requires-python = ">=3.10"
+dependencies = [
+    "tavolo-platform",
+    "tavolo-scopone",
+    "kaya-core",
+    "kaya-cors",
+    "kaya-session",
+    "kaya-session-redis",
+    "kaya-oidc",
+    "kaya-openapi",
+    "kaya-rsgi",
+    "granian>=2.0",
+    "asyncpg",
+    "aerich",
+    "httpx",
+    "PyJWT[crypto]",
+    "pwo",
+    "PyYAML",
+    "redis",
+]
+
+[project.optional-dependencies]
+dev = [
+    "mypy",
+    "httpx-ws",
+]
+otel = [
+    "kaya-otel>=0.0.4",
+]
+
+[tool.setuptools.packages.find]
+where = ["src"]
+namespaces = true
+
+[tool.mypy]
+python_version = "3.12"
+ignore_missing_imports = true
+plugins = []