factorio-save-upgrader

List the loading/upgrading steps

Document Factorio: Space Age mod requirements

Add output tree file listing at script end

Reword log messages

Use v for version prefix

Update copyright years

Use tabs for indentation

Explicitly check for external executables

Use details instead of headings in README.md

Add some color to log output

Use podman instead of docker

Add version 2.0, remove 0.18

Update README.md

Add initial factorio-save-upgrader implementation

- Locally tested script, running on Ubuntu 22.04.
- Confirmed upgrades from Factorio 0.15 to 1.1.
- Requires `docker`.
- Usage and some configuration documented in `README.md`.

S…

Initial commit