chore: get tests running in standalone configuration (#52)

* chore: add dependencies required for standalone operation

* test: make tests run without VRCSDK

* chore: add UPM package lock for 2022 editor version

* ci: also add the package manifest

* chore: add some additional dependencies for Unity 2019 standalone

.github/ProjectRoot/manifest-2022.3.5f1.json

@@ -0,0 +1,41 @@
+{
+  "dependencies": {
+    "com.unity.collab-proxy": "2.0.5",
+    "com.unity.feature.development": "1.0.1",
+    "com.unity.textmeshpro": "3.0.6",
+    "com.unity.timeline": "1.7.5",
+    "com.unity.ugui": "1.0.0",
+    "com.unity.visualscripting": "1.8.0",
+    "com.unity.modules.ai": "1.0.0",
+    "com.unity.modules.androidjni": "1.0.0",
+    "com.unity.modules.animation": "1.0.0",
+    "com.unity.modules.assetbundle": "1.0.0",
+    "com.unity.modules.audio": "1.0.0",
+    "com.unity.modules.cloth": "1.0.0",
+    "com.unity.modules.director": "1.0.0",
+    "com.unity.modules.imageconversion": "1.0.0",
+    "com.unity.modules.imgui": "1.0.0",
+    "com.unity.modules.jsonserialize": "1.0.0",
+    "com.unity.modules.particlesystem": "1.0.0",
+    "com.unity.modules.physics": "1.0.0",
+    "com.unity.modules.physics2d": "1.0.0",
+    "com.unity.modules.screencapture": "1.0.0",
+    "com.unity.modules.terrain": "1.0.0",
+    "com.unity.modules.terrainphysics": "1.0.0",
+    "com.unity.modules.tilemap": "1.0.0",
+    "com.unity.modules.ui": "1.0.0",
+    "com.unity.modules.uielements": "1.0.0",
+    "com.unity.modules.umbra": "1.0.0",
+    "com.unity.modules.unityanalytics": "1.0.0",
+    "com.unity.modules.unitywebrequest": "1.0.0",
+    "com.unity.modules.unitywebrequestassetbundle": "1.0.0",
+    "com.unity.modules.unitywebrequestaudio": "1.0.0",
+    "com.unity.modules.unitywebrequesttexture": "1.0.0",
+    "com.unity.modules.unitywebrequestwww": "1.0.0",
+    "com.unity.modules.vehicles": "1.0.0",
+    "com.unity.modules.video": "1.0.0",
+    "com.unity.modules.vr": "1.0.0",
+    "com.unity.modules.wind": "1.0.0",
+    "com.unity.modules.xr": "1.0.0"
+  }
+}