feat: compile CI to a binary with bun

[cabljac]

This is a draft PR to:

• make the cli compatible with bun
• add CI to compile genkit-tools cli to binary targets using bun
• push those binaries somewhere (to be decided)

Checklist (if applicable):

• PR title is following https://www.conventionalcommits.org/en/v1.0.0/
• Tested (manually, unit tested, etc.)
• Docs updated (updated docs or a docs bug required)

[cabljac]

just resolving some conflicts with main

[Copilot]

Pull Request Overview

A PR to enable compiling the CLI to native binaries with Bun, update TypeScript configs for JSON imports and Bun types, refactor utility imports, and add a GitHub Actions workflow for cross-platform build and validation.

• Enable resolveJsonModule and Bun type support in tsconfigs
• Refactor error utilities and package metadata imports for cleaner code
• Add compile:bun script and a new CI workflow to build and test binaries

Reviewed Changes

Copilot reviewed 12 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
genkit-tools/common/tsconfig.json	Enabled JSON module resolution
genkit-tools/common/src/utils/errors.ts	Unified connection-refused detection logic
genkit-tools/common/src/utils/utils.ts	Switched to isConnectionRefusedError in health checks
genkit-tools/common/src/utils/package.ts	Replaced runtime JSON read with static import
genkit-tools/common/package.json	Updated export/type paths and added bun-types dependency
genkit-tools/cli/tsconfig.json	Added Bun types and JSON resolution
genkit-tools/cli/src/commands/ui-start.ts	Spawned server harness via shared command constant
genkit-tools/cli/src/commands/server-harness.ts	Introduced Commander-based __server-harness entrypoint
genkit-tools/cli/src/cli.ts	Routed __server-harness invocation into main CLI program
genkit-tools/cli/package.json	Added compile:bun script, Bun typings, and TS-Node dep
.github/workflows/build-cli-binaries.yml	New workflow: build/test Bun-compiled CLI binaries per OS/arch

Files not reviewed (1)

• genkit-tools/pnpm-lock.yaml: Language not supported

Comments suppressed due to low confidence (1)

genkit-tools/common/package.json:67

• The export paths were updated to include src segments—verify that your build actually emits lib/types/src/.... Mismatches here could break consumers' import resolution.

  "types": "./lib/types/src/types/index.d.ts",