fix(language-packs): accept supported host API versions

[fcoury]

Why

Red deliberately supports multiple host API versions, but the language-pack picker and red plugin catalog compared package requirements only with the current 0.7.0 API. Because pre-1.0 caret requirements do not cross minor versions, released packs declaring ^0.6.0—including PowerShell—were incorrectly shown and rejected as incompatible even though the installer supports them.

What Changed

• Add one catalog-package compatibility method backed by the supported host API set.
• Use the shared rule for catalog install validation, picker availability and selection, and CLI catalog output.
• Cover supported prior APIs and genuinely unsupported requirements with picker and catalog regressions.

How to Test

1. Run cargo run --quiet -- plugin catalog.
   • Expect Go, PowerShell, and Swift to be reported as compatible.
2. Open Language packs from the command palette and select PowerShell.
   • Expect the pack to be available and the install choices to open without a Red API error.
3. Run cargo test --lib language_pack_picker.
   • Expect the ^0.6.0 regression to remain selectable and the unsupported API case to remain unavailable.
4. Run cargo clippy --all-targets --all-features -- -D warnings.
   • Expect no warnings or errors.