docs/install: Revamp

[cgwalters]

• Split into "local virt" and "production"
• Link to podman-bootc-cli
• Clean up, fix and inline kickstart example for readability
• Include bootc-image-builder in both local and production paths

[sallyom]

also, docs/install.md:31 line length exceeds pre-commit regulation :)

[rhatdan]

LGTM

[cgwalters]

OK I am going to need to figure out how to configure the line length limit to something sane