feat(g0v0-migrate): implement g0v0 migration system with plugin support (#97)

For details please view the PR.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

pyproject.toml

@@ -15,6 +15,7 @@ dependencies = [
     "cryptography>=41.0.7",
     "fastapi>=0.104.1",
     "fastapi-limiter>=0.1.6",
+    "g0v0-migrations",
     "httpx>=0.28.1",
     "jinja2>=3.1.0",
     "loguru>=0.7.3",
@@ -123,10 +124,12 @@ exclude = ["migrations/", ".venv/", "venv/"]
 [tool.uv.workspace]
 members = [
     "packages/osupyparser",
+    "packages/g0v0-migrations",
 ]
 
 [tool.uv.sources]
 osupyparser = { git = "https://github.com/MingxuanGame/osupyparser.git" }
+g0v0-migrations = { workspace = true }
 
 [dependency-groups]
 dev = [