chore: add minimal Craft release tooling configuration

[vaind]

Summary

• Add minimal .craft.yml configuration for automated GitHub releases
• Add release workflow with required version input

Details

This adds basic Craft release tooling to enable automated release management:

Craft Configuration (.craft.yml)

• Uses same minVersion (0.23.1) and auto changelog policy as other Sentry repos
• GitHub-only releases - no artifact publishing needed
• preReleaseCommand: pwsh -c '' (no-op command that always succeeds)
• No actual version tracking or file updates needed

Release Workflow (.github/workflows/release.yml)

• Manual workflow_dispatch trigger with required version input
• No auto-version generation - user must provide version manually
• Uses getsentry/action-prepare-release@v1 to handle release preparation
• Authenticates with Sentry release bot credentials
• Simple and minimal compared to console SDK workflows

Key Differences from Console SDKs

• No VERSION file: No version tracking in repository
• No scripts: No version bump or generation scripts needed
• Required input: Version must always be provided manually
• No-op preRelease: Command does nothing but succeed

This enables the github-workflows repository to use the standard Sentry release process while keeping the implementation minimal.

#skip-changelog

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