[sandersonstabo]

Merge upstream OpenCode dev through dc0bfc5, including the native /goal command and plugin RPC, while preserving Artisan’s OPENCODE_HOME isolation and contribution licensing.

Remove the documentation hunk from the release patch so upstream documentation changes cannot block patched releases. The patch applies cleanly with git am -3 to v2.2.2.

Validation: full upstream lint and typecheck passed (35 packages); 20 native goal/watchdog tests and 3 CLI path tests passed.

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Summary by cubic

Merges upstream OpenCode dev into Artisan, adding the native /goal command, plugin RPC, and desktop GUI plugin support while preserving Artisan's OPENCODE_HOME isolation and contribution licensing.

Highlights

• Desktop GUI plugins land the new Extensions › Plugins management screen.
• Release CI is restructured into build, sign, and publish stages with digest-verified artifacts; only releasers can start stable releases.
• Nix hashes now publish through an auto-merged, scope-checked bot pull request.

Release handling

• The documentation hunk is removed from the release patch so upstream doc changes can't block patched releases.
• The patch applies cleanly with git am -3 to v2.2.2.

Validation: lint and typecheck pass across 35 packages; 20 native goal/watchdog tests and 3 CLI path tests pass.

^{Written for commit f543006. Summary will update on new commits.}