refactor: Migrate from ActivityPub federation to native Swarm network

- Remove ActivityPub infrastructure (webfinger, nodeinfo, inbox, activities, signatures)
- Implement native peer-to-peer Swarm network with gossip protocol
- Replace federated timeline with Swarm timeline aggregating posts from all nodes
- Migrate direct messaging to end-to-end encrypted Swarm Chat system
- Update user interactions (follow, like, repost) to use Swarm protocol
- Add cryptographic key management for DID-based identity system
- Remove server-bound identity model in favor of portable DID identities
- Update documentation to reflect Swarm architecture and capabilities
- Add debug utilities and chat testing tools for Swarm network
- Refactor database schema to support distributed user directory
- Update bot framework to work with Swarm network interactions
- Simplify API routes to use Swarm protocol instead of ActivityPub
- This transition enables true peer-to-peer communication, instant interactions, and encrypted messaging while maintaining sovereign identity through DIDs

src/lib/crypto/keys.ts

@@ -0,0 +1,36 @@
+/**
+ * Cryptographic Key Generation
+ * 
+ * Generates RSA key pairs for signing posts and verifying identity.
+ */
+
+import * as crypto from 'crypto';
+
+/**
+ * Generate an RSA key pair for signing
+ */
+export async function generateKeyPair(): Promise<{ publicKey: string; privateKey: string }> {
+    return new Promise((resolve, reject) => {
+        crypto.generateKeyPair(
+            'rsa',
+            {
+                modulusLength: 2048,
+                publicKeyEncoding: {
+                    type: 'spki',
+                    format: 'pem',
+                },
+                privateKeyEncoding: {
+                    type: 'pkcs8',
+                    format: 'pem',
+                },
+            },
+            (err, publicKey, privateKey) => {
+                if (err) {
+                    reject(err);
+                } else {
+                    resolve({ publicKey, privateKey });
+                }
+            }
+        );
+    });
+}