cli: Don't copy changelog/ for jetpack generate from starter plug…

…in (#37268)

When using `jetpack generate` to create a new plugin based on the
starter plugin, we need to make sure that the contents of the
`changelog/` directory are not copied. The new plugin should start with
an empty changelog directory.

tools/cli/commands/generate.js

@@ -377,11 +377,18 @@ async function generatePluginFromStarter( projDir, answers ) {
 	} );
 	files = files.split( '\n' ).map( str => str.replace( 'projects/plugins/starter-plugin', '' ) );
 	files.forEach( file => {
-		if ( file ) {
+		if ( file && ! file.startsWith( 'changelog/' ) ) {
 			copyFile( path.join( projDir, file ), path.join( starterDir, file ) );
 		}
 	} );
 
+	// Initialize changelog dir.
+	mergeDirs(
+		fileURLToPath( new URL( '../skeletons/common/changelog', import.meta.url ) ),
+		path.join( projDir, 'changelog' ),
+		answers.name
+	);
+
 	// Replace strings.
 	await searchReplaceInFolder( projDir, 'jetpack-starter-plugin', normalizeSlug( answers.name ) );
 	await searchReplaceInFolder( projDir, 'starter-plugin', normalizeSlug( answers.name, false ) );