Add web front-end and fix API issues

node_modules/concurrently/dist/lib/command-parser/expand-arguments.d.ts

@@ -0,0 +1,18 @@
+import { CommandInfo } from '../command.js';
+import { CommandParser } from './command-parser.js';
+/**
+ * Replace placeholders with additional arguments.
+ */
+export declare class ExpandArguments implements CommandParser {
+    private readonly additionalArguments;
+    constructor(additionalArguments: string[]);
+    parse(commandInfo: CommandInfo): {
+        command: string;
+        name: string;
+        env?: Record<string, unknown>;
+        cwd?: string;
+        prefixColor?: string;
+        ipc?: number;
+        raw?: boolean;
+    };
+}