feat(distribution): binary release pipeline + brew + winget

- .github/workflows/release-cli.yml: build self-contained binaries via
  `bun build --compile` for darwin/linux/windows × x64/arm64 on every
  cli-v* tag, attach to GitHub Release with SHA256SUMS, auto-bump the
  homebrew tap on non-prerelease versions.
- packaging/homebrew/claudemesh.rb.template: formula template for the
  homebrew-claudemesh tap.
- packaging/winget/claudemesh.yaml.template: winget manifest template.
- /install script now detects absence of Node and downloads the
  platform-appropriate binary from the GitHub Release, installs to
  ~/.claudemesh/bin, and shims into ~/.local/bin — zero Node required.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packaging/winget/claudemesh.yaml.template

@@ -0,0 +1,31 @@
+# winget manifest template for claudemesh.
+# Submit via PR to microsoft/winget-pkgs after each non-prerelease cli-v* tag.
+# The release-cli workflow can automate this with a wingetcreate step.
+
+PackageIdentifier: Claudemesh.Claudemesh
+PackageVersion: 1.0.0
+PackageName: Claudemesh
+Publisher: Alejandro Gutierrez
+License: MIT
+LicenseUrl: https://github.com/alezmad/claudemesh/blob/main/LICENSE
+ShortDescription: Peer mesh for Claude Code sessions
+Description: |-
+  Claudemesh connects multiple Claude Code sessions into a peer mesh.
+  End-to-end encrypted, keys stay on your machine. Invite, share state,
+  verify safety numbers, back up encrypted configs.
+Moniker: claudemesh
+Tags:
+  - claude
+  - cli
+  - mesh
+  - ai
+  - developer-tools
+Installers:
+  - Architecture: x64
+    InstallerType: portable
+    InstallerUrl: https://github.com/alezmad/claudemesh/releases/download/cli-v{{version}}/claudemesh-windows-x64.exe
+    InstallerSha256: REPLACED_BY_CI
+    Commands:
+      - claudemesh
+ManifestType: singleton
+ManifestVersion: 1.6.0