fix(deps): add typing-extensions

Added typing-extensions to fix import error in Python <3.13.

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "poetry.core.masonry.api"
 name = "jcloud-docsgen"
 version = "0.2.1"
 description = "A tool that generates Markdown documentation for software project source code"
-dependencies = ["docstring-parser"]
+dependencies = ["docstring-parser", "typing-extensions (>=4.16.0,<5.0.0)"]
 requires-python = ">=3.10"
 license = "Apache-2.0"