packages,plugins: add package documentation

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/cli-common/api-report.md

@@ -23,6 +23,4 @@ export type Paths = {
 
 // @public (undocumented)
 export type ResolveFunc = (...paths: string[]) => string;
-
-// (No @packageDocumentation comment for this package)
 ```

packages/cli-common/src/index.ts

@@ -14,6 +14,12 @@
  * limitations under the License.
  */
 
+/**
+ * Common functionality used by cli, backend, and create-app
+ *
+ * @packageDocumentation
+ */
+
 export { findPaths } from './paths';
 export { isChildPath } from './isChildPath';
 export type { Paths, ResolveFunc } from './paths';