feat: submit Winget manifest for Windows Package Manager support

[IceRhymers]

Goal

Allow Windows users to install via: winget install IceRhymers.DatabricksClaude

How Winget works

Winget uses manifests submitted to the public microsoft/winget-pkgs repo. Each release requires a PR with YAML manifest files.

What to add

• Create manifest files under manifests/i/IceRhymers/DatabricksClaude/<version>/:
  • IceRhymers.DatabricksClaude.installer.yaml — installer URLs for windows-amd64 and windows-arm64 .exe assets, SHA256 hashes
  • IceRhymers.DatabricksClaude.locale.en-US.yaml — name, publisher, description, license (MIT), URLs
  • IceRhymers.DatabricksClaude.yaml — top-level manifest linking the others
• Automate via CI: add a step to update-homebrew job (or new update-winget job) in release.yml that uses wingetcreate or opens a PR to microsoft/winget-pkgs after each release
• Add Winget install instructions to README:

  winget install IceRhymers.DatabricksClaude
  

Acceptance Criteria

• winget install IceRhymers.DatabricksClaude works on Windows 10/11
• Manifest accepted into microsoft/winget-pkgs
• Process documented for future releases