fix(@angular/cli): add schema.json options to parsed command, also when a version is passed to ng add <package>@<version>

This commit fixes the method `AddCommandModule.getCollectionName()`, so it now returns only the package name, but remove the specified version (if present).

Previously, a `@<version>` specified in the const `collectionName` was causing a (silenced) error during the invocation of `workflow.engine.createCollection(collectionName)`, which lead to skipping eventually the invocation of the method `this.addSchemaOptionsToCommand()` in the try/catch block.

fixes angular#27766

Author: Platonn

packages/angular/cli/src/commands/add/cli.ts

@@ -346,7 +346,17 @@ export default class AddCommandModule
   }
 
   private async getCollectionName(): Promise<string> {
-    const [, collectionName] = this.context.args.positional;
+    let [, collectionName] = this.context.args.positional;
+
+    // The CLI argument may specify also a version, like `ng add @my/[email protected]`,
+    // but here we need only the name of the package, like `@my/lib`.
+
+    const versionIdx = collectionName.lastIndexOf('@');
+    // We assume any `@` character on the position other than 0 is a version separator.
+    // We disregard the edge case of using npm package aliases, like `ng add alias-name@npm:real-name`.
+    if (versionIdx > 0) {
+      collectionName = collectionName.slice(0, versionIdx);
+    }
 
     return collectionName;
   }