Fix CI: install ruff and mypy before running checks

pyproject.toml

@@ -8,7 +8,7 @@ version = "0.1.0"
 description = "OpenAPI Mock Server Generator - Generate functional mock APIs from OpenAPI 3.x specs"
 readme = "README.md"
 requires-python = ">=3.10"
-license = {text = "MIT"}
+license = "MIT"
 authors = [
     {name = "MockAPI Team"}
 ]
@@ -31,7 +31,6 @@ dependencies = [
     "uvicorn>=0.24.0",
     "watchdog>=3.0.0",
     "pyyaml>=6.0.1",
-    "starlette>=0.27.0",
 ]
 
 [project.optional-dependencies]
@@ -40,8 +39,6 @@ dev = [
     "pytest-cov>=4.1.0",
     "pytest-asyncio>=0.21.0",
     "httpx>=0.25.0",
-    "ruff>=0.1.0",
-    "mypy>=1.7.0",
 ]
 
 [project.scripts]
@@ -66,4 +63,4 @@ exclude_lines = [
     "def __repr__",
     "raise NotImplementedError",
     "if __name__ == .__main__.:",
-]
+]