installation.md predated the install/packaging work that landed on main: - drop the "once published" placeholders now that v0.2.0 is live - fix the Homebrew/Scoop commands (tap/bucket-add forms; the bare `brew install rdbms-playground` was wrong) - add the curl|sh and PowerShell one-line installers (ADR-0055), `cargo install` / `cargo binstall` (ADR-0056), and prebuilt binaries - present winget as coming-soon (PR awaiting the public catalogue) command-line-options.md: add `-V`/`--version` and the in-app `version` command (ADR-0054).