[Protocol] Inline package assembly, fix cmake-format, add workflow_dispatch

- Replace the custom Node packaging script with a flat inline step
  (cp the .proto glob, cp the static files, npm version) so the
  workflow speaks the same shell idiom as the other workflows.
- Promote package.json and README.md to static files under
  libcockatrice_protocol/npm/ so contributors edit them in-place.
- Re-format libcockatrice_protocol/CMakeLists.txt per .cmake-format.json.
- Add workflow_dispatch (manual run; optional version input) and
  timeout-minutes: 10.
- Drop --provenance from npm publish: GitHub Packages doesn't
  attest Sigstore provenance.

libcockatrice_protocol/CMakeLists.txt

@@ -11,11 +11,14 @@ if(NOT CMAKE_MATCH_1)
   message(FATAL_ERROR "Failed to extract protocolVersion from ${PROTOCOL_VERSION_JSON_PATH}")
 endif()
 set(COCKATRICE_PROTOCOL_VERSION "${CMAKE_MATCH_1}")
-set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS "${PROTOCOL_VERSION_JSON_PATH}")
+set_property(
+  DIRECTORY
+  APPEND
+  PROPERTY CMAKE_CONFIGURE_DEPENDS "${PROTOCOL_VERSION_JSON_PATH}"
+)
 configure_file(
   "${CMAKE_CURRENT_SOURCE_DIR}/protocol_version.h.in"
-  "${CMAKE_CURRENT_BINARY_DIR}/libcockatrice/protocol/protocol_version.h"
-  @ONLY
+  "${CMAKE_CURRENT_BINARY_DIR}/libcockatrice/protocol/protocol_version.h" @ONLY
 )
 
 add_subdirectory(libcockatrice/protocol/pb)

libcockatrice_protocol/npm/README.md

@@ -0,0 +1,30 @@
+# @cockatrice/protocol
+
+Network protocol artifacts for [Cockatrice](https://github.com/Cockatrice/Cockatrice): the `.proto`
+definitions used by the desktop client, Servatrice, and the webclient, plus the
+authoritative protocol version constant they all share.
+
+## Install
+
+```sh
+npm install @cockatrice/protocol
+```
+
+The package is published to GitHub Packages under the `@cockatrice` scope; consumers
+need an `.npmrc` entry pointing the scope at `https://npm.pkg.github.com` and a
+`GITHUB_TOKEN` with `read:packages`.
+
+## Contents
+
+- `pb/*.proto` — every protobuf schema file from `libcockatrice_protocol`.
+- `protocol_version.json` — `{ "protocolVersion": <int> }`. Identical to the file
+  the C++ build reads via `configure_file()`.
+
+## Usage (TypeScript)
+
+```ts
+import protocolVersionInfo from "@cockatrice/protocol/protocol_version.json" with { type: "json" };
+export const PROTOCOL_VERSION = protocolVersionInfo.protocolVersion;
+```
+
+Point your protobuf code-generator (e.g. buf) at `node_modules/@cockatrice/protocol/pb`.

libcockatrice_protocol/npm/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "@cockatrice/protocol",
+  "version": "0.0.0",
+  "description": "Cockatrice network protocol: .proto definitions and protocol version constant.",
+  "license": "GPL-2.0-or-later",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Cockatrice/Cockatrice.git"
+  },
+  "homepage": "https://github.com/Cockatrice/Cockatrice",
+  "files": [
+    "pb/",
+    "protocol_version.json",
+    "LICENSE",
+    "README.md"
+  ],
+  "publishConfig": {
+    "registry": "https://npm.pkg.github.com",
+    "access": "restricted"
+  },
+  "exports": {
+    "./protocol_version.json": "./protocol_version.json",
+    "./pb/*.proto": "./pb/*.proto"
+  }
+}