fixed pyservectl linter errors and formatting

pyserve/ctl/main.py

@@ -7,7 +7,7 @@ Usage:
 
 import sys
 from pathlib import Path
-from typing import Optional
+from typing import TYPE_CHECKING, Optional
 
 import click
 
@@ -28,22 +28,26 @@ from .commands import (
 
 from .. import __version__
 
+if TYPE_CHECKING:
+    from ..config import Config
+    from .state import StateManager
+
 DEFAULT_CONFIG = "config.yaml"
 DEFAULT_STATE_DIR = ".pyserve"
 
 
 class Context:
-    def __init__(self):
+    def __init__(self) -> None:
         self.config_file: str = DEFAULT_CONFIG
         self.state_dir: Path = Path(DEFAULT_STATE_DIR)
         self.verbose: bool = False
         self.debug: bool = False
         self.project: Optional[str] = None
-        self._config = None
-        self._state = None
+        self._config: Optional["Config"] = None
+        self._state: Optional["StateManager"] = None
 
     @property
-    def config(self):
+    def config(self) -> "Config":
         if self._config is None:
             from ..config import Config
 
@@ -54,7 +58,7 @@ class Context:
         return self._config
 
     @property
-    def state(self):
+    def state(self) -> "StateManager":
         if self._state is None:
             from .state import StateManager
 
@@ -96,7 +100,7 @@ pass_context = click.make_pass_decorator(Context, ensure=True)
 )
 @click.version_option(version=__version__, prog_name="pyservectl")
 @click.pass_context
-def cli(ctx, config_file: str, project: Optional[str], verbose: bool, debug: bool):
+def cli(ctx: click.Context, config_file: str, project: Optional[str], verbose: bool, debug: bool) -> None:
     """
     PyServeCTL - Service management CLI for PyServe.
 
@@ -145,7 +149,7 @@ cli.add_command(scale_cmd, name="scale")
 cli.add_command(ps_cmd, name="status")
 
 
-def main():
+def main() -> None:
     try:
         cli(standalone_mode=False)
     except click.ClickException as e: