Add pnpm hcl (#436)

pnpm.hcl

@@ -0,0 +1,33 @@
+description = "pnpm is a package manager for JavaScript and Node.js projects. It is an alternative package manager to the widely used npm (Node Package Manager) and Yarn."
+test = "pnpm --version"
+binaries = ["pnpm"]
+
+version "8.14.1" {
+  platform "linux" "amd64" {
+    source = "https://github.com/pnpm/pnpm/releases/download/v${version}/pnpm-${os}-x64"
+    on unpack {
+      rename { from = "${root}/pnpm-${os}-x64" to = "${root}/pnpm" }
+    }
+  }
+
+  platform "linux" "arm64" {
+    source = "https://github.com/pnpm/pnpm/releases/download/v${version}/pnpm-${os}-${arch}"
+    on unpack {
+      rename { from = "${root}/pnpm-${os}-arm64" to = "${root}/pnpm" }
+    }
+  }
+
+  platform "darwin" "amd64" {
+    source = "https://github.com/pnpm/pnpm/releases/download/v${version}/pnpm-macos-x64"
+    on unpack {
+      rename { from = "${root}/pnpm-macos-x64" to = "${root}/pnpm" }
+    }
+  }
+
+  platform "darwin" "arm64" {
+  source = "https://github.com/pnpm/pnpm/releases/download/v${version}/pnpm-macos-${arch}"
+    on unpack {
+      rename { from = "${root}/pnpm-macos-${arch}" to = "${root}/pnpm" }
+    }
+  }
+}