chore: stop building packages during install

[lilienblum]

Summary

• remove the prepare build hook from the core, commands, bindings, and SDK packages
• keep package compilation behind the existing explicit build commands

Why

A workspace pnpm install currently compiles all four packages as a lifecycle side effect. Bootstrap only needs dependencies installed, so that work is unnecessary and makes setup appear stuck.

The stable and dev npm release workflows already run pnpm build before publishing or packing. A prepack replacement would keep compilation implicit and duplicate those release build steps.

Validation

• fresh and repeated pnpm install --frozen-lockfile complete without invoking the package builds
• explicit builds succeed for core, commands, bindings, and SDK
• package-layout fixture passes all 28 packed-artifact and consumer checks
• Biome passes for the changed manifests

[greptile-apps]

Greptile Summary

The PR removes install-time package compilation and explicitly builds required artifacts before tests and release smoke checks.

• Removes prepare build hooks from core, commands, bindings, and SDK packages.
• Makes Turbo tests depend on package builds.
• Builds the native bindings addon before bindings tests.
• Builds core and bindings packages before the release addon smoke test.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains in the fixes for the previously reported clean-checkout test failures.

Important Files Changed

Filename	Overview
turbo.json	Adds package and dependency builds before tests, resolving the clean-checkout missing-distribution-artifact failure.
packages/bindings/turbo.json	Preserves inherited test build dependencies and adds native-addon compilation before bindings tests.
.github/workflows/release.yml	Explicitly builds core and bindings artifacts before the staged-addon smoke test.
packages/core/package.json	Removes install-time compilation while retaining the explicit build command.
packages/commands/package.json	Removes install-time compilation while retaining the explicit build command.
packages/bindings/package.json	Removes install-time TypeScript compilation while retaining explicit wrapper and addon build commands.
packages/sdk/package.json	Removes install-time compilation while retaining the explicit build command.

_{Reviews (3): Last reviewed commit: "test: build bindings addon before tests" | Re-trigger Greptile}

[lilienblum]

Superseded by #236, recreated from the same tested head on an ALIEN-374-compliant branch so CI can run.