Add Nostr Feed Manager: Rust backend with Electron + React GUI

- Rust library (nostr-manager-backend) with CLI and JSON-lines IPC serve mode:
  profiles, publishing with per-relay reports, relays, settings, vault storage
  and legacy-vault migration
- Electron + React + TypeScript desktop GUI using the same backend over stdio IPC
- Vitest suite with a fake backend speaking the real protocol
- electron-builder linux packaging; README with build and usage instructions

nostr_feed_manager.py

@@ -0,0 +1,60 @@
+import subprocess
+import json
+import os
+import sys
+from typing import Dict, Any, Optional
+
+# Path to your Rust binary (adjust if you move it)
+RUST_BINARY = "/home/avi/Projects/skills/nost-feed-manager/target/release/nostr-manager-backend"
+
+class NostrFeedManager:
+    """
+    A skill for Hermes to manage multiple Nostr profiles.
+    """
+
+    def __init__(self):
+        self.vault_file = "/home/avi/Projects/skills/nost-feed-manager/profiles_vault.json"
+
+    def _run_rust_command(self, command: str, args: list) -> str:
+        """Executes the Rust binary."""
+        # Ensure the Rust binary exists
+        if not os.path.exists(RUST_BINARY):
+            return f"Error: Rust binary not found at {RUST_BINARY}. Please compile it first."
+        
+        cmd = [RUST_BINARY, command] + args
+        try:
+            # Set the environment variable for the Rust binary if needed
+            env = os.environ.copy()
+            result = subprocess.run(cmd, capture_output=True, text=True, timeout=10, env=env)
+            if result.returncode == 0:
+                return result.stdout.strip()
+            else:
+                return f"Error: {result.stderr.strip()}"
+        except Exception as e:
+            return f"Execution Error: {str(e)}"
+
+    def create_profile(self, label: str) -> str:
+        """Create a new Nostr profile."""
+        return self._run_rust_command("create", [label])
+
+    def list_profiles(self) -> str:
+        """List all managed profiles."""
+        return self._run_rust_command("list", [])
+
+    def switch_profile(self, npub: str) -> str:
+        """Switch the active profile context."""
+        return self._run_rust_command("switch", [npub])
+
+    def publish_action(self, profile_npub: str, content: str, is_private: bool = False, recipient: Optional[str] = None) -> str:
+        """Publish a post or DM."""
+        args = [profile_npub, content, str(is_private).lower()]
+        if is_private and recipient:
+            args.append(recipient)
+        return self._run_rust_command("publish", args)
+
+# Export the class so Hermes can import it if running as a module
+if __name__ == "__main__":
+    # Simple CLI test
+    manager = NostrFeedManager()
+    print("Nostr Feed Manager Skill Loaded.")
+    print("Usage: manager.create_profile('Name')")