cargo: Add inlined dependencies

See https://peps.python.org/pep-0723/#example

Closes #481

Author: bbhtt

cargo/README.md

@@ -6,7 +6,7 @@ Tool to automatically generate `flatpak-builder` manifest json from a `Cargo.loc
 
 Poetry users can run `poetry install` and skip this.
 
-Otherwise install Python 3.8+ with these modules:
+Otherwise install Python 3.9+ with these modules:
 - tomlkit
 - aiohttp
 - (Optional) PyYAML>=6.0.2 for YAML output instead of JSON

cargo/flatpak-cargo-generator.py

@@ -1,4 +1,12 @@
 #!/usr/bin/env python3
+# /// script
+# requires-python = ">=3.9"
+# dependencies = [
+#    "aiohttp<4.0.0,>=3.9.5",
+#    "PyYAML<7.0.0,>=6.0.2",
+#    "tomlkit>=0.13.3,<1.0"
+# ]
+# ///
 
 __license__ = "MIT"
 import argparse