feat(custom-rulesets): support custom rulesets (#23)

* feat(custom_ruleset): add custom rulesets support

* feat(custom-ruleset): add version check

* feat(custom-ruleset): add LegacyIO API to get ruleset hashes

* feat(pp): add check for rulesets whose pp cannot be calculated

* docs(readme): update README to include support for custom rulesets

* fix(custom-ruleset): make `rulesets` empty instead of throw a error when version check is disabled

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

* chore(custom-ruleset): apply the latest changes of generator

c891bcd159

and

e25041ad3b

* feat(calculator): add fallback performance calculation for unsupported modes

* fix(calculator): remove debug print

* fix: resolve reviews

* feat(calculator): add difficulty calculation checks

---------

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

app/router/v1/beatmap.py

@@ -152,7 +152,7 @@ async def get_beatmaps(
     beatmap_id: Annotated[int | None, Query(alias="b", description="谱面 ID")] = None,
     user: Annotated[str | None, Query(alias="u", description="谱师")] = None,
     type: Annotated[Literal["string", "id"] | None, Query(description="用户类型：string 用户名称 / id 用户 ID")] = None,
-    ruleset_id: Annotated[int | None, Query(alias="m", description="Ruleset ID", ge=0, le=3)] = None,  # TODO
+    ruleset_id: Annotated[int | None, Query(alias="m", description="Ruleset ID")] = None,  # TODO
     convert: Annotated[bool, Query(alias="a", description="转谱")] = False,  # TODO
     checksum: Annotated[str | None, Query(alias="h", description="谱面文件 MD5")] = None,
     limit: Annotated[int, Query(ge=1, le=500, description="返回结果数量限制")] = 500,