fix: add private:true to packages not meant for npm (#345)

* fix(ci): run on all PRs with conditional skip

- Remove paths filter from pull_request trigger
- Add check-changes job to detect code changes
- Skip full CI if no code files changed
- Satisfies branch protection while avoiding unnecessary builds

* fix: add private:true to packages not meant for npm

Prevents changesets from trying to publish internal packages:
- engine/* (8 packages)
- rendering/* (8 packages)
- physics/* (2 packages)
- streaming/* (1 package)
- tools/sdk, tools/worker-generator

packages/engine/material-system/package.json

@@ -1,48 +1,49 @@
 {
-    "name": "@esengine/material-system",
-    "version": "1.0.0",
-    "description": "Material and shader system for ES Engine",
-    "esengine": {
-        "plugin": true,
-        "pluginExport": "MaterialSystemPlugin",
-        "category": "rendering",
-        "isEnginePlugin": true
-    },
-    "main": "dist/index.js",
-    "module": "dist/index.js",
-    "types": "dist/index.d.ts",
-    "type": "module",
-    "exports": {
-        ".": {
-            "types": "./dist/index.d.ts",
-            "import": "./dist/index.js"
-        }
-    },
-    "files": [
-        "dist"
-    ],
-    "scripts": {
-        "build": "tsup",
-        "build:watch": "tsup --watch",
-        "type-check": "tsc --noEmit",
-        "clean": "rimraf dist"
-    },
-    "devDependencies": {
-        "@esengine/ecs-framework": "workspace:*",
-        "@esengine/asset-system": "workspace:*",
-        "@esengine/engine-core": "workspace:*",
-        "@esengine/build-config": "workspace:*",
-        "rimraf": "^5.0.5",
-        "tsup": "^8.0.0",
-        "typescript": "^5.3.3"
-    },
-    "keywords": [
-        "ecs",
-        "material",
-        "shader",
-        "webgl",
-        "rendering"
-    ],
-    "author": "yhh",
-    "license": "MIT"
+  "name": "@esengine/material-system",
+  "version": "1.0.0",
+  "description": "Material and shader system for ES Engine",
+  "esengine": {
+    "plugin": true,
+    "pluginExport": "MaterialSystemPlugin",
+    "category": "rendering",
+    "isEnginePlugin": true
+  },
+  "main": "dist/index.js",
+  "module": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "type": "module",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "tsup",
+    "build:watch": "tsup --watch",
+    "type-check": "tsc --noEmit",
+    "clean": "rimraf dist"
+  },
+  "devDependencies": {
+    "@esengine/ecs-framework": "workspace:*",
+    "@esengine/asset-system": "workspace:*",
+    "@esengine/engine-core": "workspace:*",
+    "@esengine/build-config": "workspace:*",
+    "rimraf": "^5.0.5",
+    "tsup": "^8.0.0",
+    "typescript": "^5.3.3"
+  },
+  "keywords": [
+    "ecs",
+    "material",
+    "shader",
+    "webgl",
+    "rendering"
+  ],
+  "author": "yhh",
+  "license": "MIT",
+  "private": true
 }