Refactor config module with type annotations

- Added type annotations to  and  functions
- Removed unnecessary variable assignments

src/utils/config.py

@@ -6,25 +6,25 @@
 CONFIG_FILE: str = os.path.join(HOME_DIR, ".gen-commit")
 
 
-def read_config():
+def read_config() -> dict:
     if not os.path.exists(CONFIG_FILE):
         print(
             f"Config file not found at {CONFIG_FILE}. Please run `gencommit --init` to create a config file."
         )
         sys.exit(1)
 
-    config = {}
+    config: dict[str, str] = {}
     with open(CONFIG_FILE, "r") as f:
         for line in f:
             key, value = line.strip().split("=", 1)
             config[key] = value
     return config
 
 
-def read_version_from_pyproject():
+def read_version_from_pyproject() -> str:
     try:
         with open("pyproject.toml", "rb") as f:
-            pyproject_data = tomli.load(f)
+            pyproject_data: dict[str, any] = tomli.load(f)
         return pyproject_data["project"]["version"]
     except (FileNotFoundError, KeyError):
         return "0.0.0"  # Default version if not found