Add typst-gather 0.2.2 binary dependency

[gordonwoodhull]

Summary

• Adds typst-gather v0.2.2 as a downloaded binary dependency, following the same pattern as Pandoc, Typst, esbuild, and other binary deps
• Pre-built binaries are fetched from GitHub releases for all 5 supported platform/arch combos (x86_64 + aarch64, Linux/macOS/Windows)
• This is a dependency-only prerequisite for move typst-gather out of core build #13983 (selective typst package staging)

Files changed

• configuration — add TYPST_GATHER=0.2.2
• package/src/common/dependencies/typst-gather.ts — new dependency definition
• package/src/common/dependencies/dependencies.ts — register in dependency list

Test plan

• Verify ./configure.sh downloads the binary to package/dist/bin/tools/<arch>/typst-gather
• Verify typst-gather --version reports 0.2.2
• Verify CI passes on all platforms

[posit-snyk-bot]

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[gordonwoodhull]

Hi @cscheid - I'm moving typst-gather to its own repo.

Here is the dependency change only, using the new archiveOnly flag, to be removed in the follow-up

• Selective typst package staging with typst-gather #14174

To be safe, let's merge this as soon as we start 1.10. Should be safe to backport if we want to.