Removed embedded cinemachine and externalised as a package

Assets/Gizmos/Cinemachine/cm_logo_lg.png.meta

   spriteMeshType: 1
   alignment: 0
   spritePivot: {x: 0.5, y: 0.5}
+  spritePixelsToUnits: 100
-  spritePixelsToUnits: 100
+  spriteGenerateFallbackPhysicsShape: 1
   alphaUsage: 1
   alphaIsTransparency: 0
   spriteTessellationDetail: -1

Packages/manifest.json

 {
   "registry": "https://staging-packages.unity.com",
   "dependencies": {
-    "com.unity.render-pipelines.lightweight": "1.1.2-preview"
+    "com.unity.cinemachine": "2.1.12",
+    "com.unity.render-pipelines.lightweight": "1.1.2-preview",
+    "com.unity.package-manager-ui": "1.8.6"
   }
 }

Assets/Cinemachine.meta

-fileFormatVersion: 2
-guid: 518613a83cd66894f919ccccd606ee03
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: