feat(openclaw): add Workspace Files panel for managing bootstrap md files

Add a dedicated panel to read/write OpenClaw's 6 workspace bootstrap files
(AGENTS.md, SOUL.md, USER.md, IDENTITY.md, TOOLS.md, MEMORY.md) directly
from ~/.openclaw/workspace/, with a whitelist-secured backend and Markdown
editor UI. Also fix prompt auto-import missing OpenCode/OpenClaw and the
PromptFormPanel filenameMap type exclusion.

src/lib/api/workspace.ts

@@ -0,0 +1,11 @@
+import { invoke } from "@tauri-apps/api/core";
+
+export const workspaceApi = {
+  async readFile(filename: string): Promise<string | null> {
+    return invoke<string | null>("read_workspace_file", { filename });
+  },
+
+  async writeFile(filename: string, content: string): Promise<void> {
+    return invoke<void>("write_workspace_file", { filename, content });
+  },
+};