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/homebrew/claudemesh.rb.template

@@ -0,0 +1,54 @@
+# Homebrew formula template — lives in the `alezmad/homebrew-claudemesh` tap.
+#
+# The release-cli workflow bumps `version`, `url`, and `sha256` per platform
+# via `brew bump-formula-pr`. This template is the source shape — copy it
+# into the tap repo as `Formula/claudemesh.rb` when bootstrapping, then let
+# CI keep it up to date.
+
+class Claudemesh < Formula
+  desc "Peer mesh for Claude Code sessions"
+  homepage "https://claudemesh.com"
+  version "1.0.0-alpha.28"
+  license "MIT"
+
+  on_macos do
+    if Hardware::CPU.arm?
+      url "https://github.com/alezmad/claudemesh/releases/download/cli-v#{version}/claudemesh-darwin-arm64"
+      sha256 "REPLACED_BY_CI"
+    else
+      url "https://github.com/alezmad/claudemesh/releases/download/cli-v#{version}/claudemesh-darwin-x64"
+      sha256 "REPLACED_BY_CI"
+    end
+  end
+
+  on_linux do
+    if Hardware::CPU.arm?
+      url "https://github.com/alezmad/claudemesh/releases/download/cli-v#{version}/claudemesh-linux-arm64"
+      sha256 "REPLACED_BY_CI"
+    else
+      url "https://github.com/alezmad/claudemesh/releases/download/cli-v#{version}/claudemesh-linux-x64"
+      sha256 "REPLACED_BY_CI"
+    end
+  end
+
+  def install
+    bin.install Dir["*"].first => "claudemesh"
+  end
+
+  def caveats
+    <<~EOS
+      To enable click-to-launch from invite emails:
+        claudemesh url-handler install
+
+      To show live peer count in Claude Code:
+        claudemesh install --status-line
+
+      Shell completions:
+        claudemesh completions zsh > "$(brew --prefix)/share/zsh/site-functions/_claudemesh"
+    EOS
+  end
+
+  test do
+    assert_match "claudemesh", shell_output("#{bin}/claudemesh --version")
+  end
+end

packaging/winget/claudemesh.yaml.template

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+# 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