feat: Implement collaborative reasoning via Antennae

This commit completes Phase 2 of the Ollama integration. The bzzz-agent is now capable of participating in collaborative discussions.

Key changes:
- The pubsub module has been refactored to use a generic message handler, decoupling it from the github integration logic.
- The github integration module now maintains a history of active conversations for each task.
- When a peer sends a message on the meta-discussion channel, the agent will:
  1. Append the message to the conversation history.
  2. Construct a new prompt containing the full context (original task + conversation history).
  3. Use the 'reasoning' module to generate a context-aware response.
  4. Publish the response back to the discussion channel.
- The main application has been updated to wire up the new handlers.

The agent can now intelligently discuss and refine plans with its peers before and during task execution.

main.go

@@ -52,11 +52,11 @@ func main() {
 	// === GitHub Integration ===
 	// This would be loaded from a config file in a real application
 	githubConfig := &github.Config{
-		AuthToken:  os.Getenv("GITHUB_TOKEN"), // Make sure to set this environment variable
-		Owner:      "anthonyrawlins",
-		Repository: "bzzz",
+		AccessToken: os.Getenv("GITHUB_TOKEN"), // Corrected field name
+		Owner:       "anthonyrawlins",
+		Repository:  "bzzz",
 	}
-	ghClient, err := github.NewClient(githubConfig)
+	ghClient, err := github.NewClient(ctx, githubConfig) // Added missing ctx argument
 	if err != nil {
 		log.Fatalf("Failed to create GitHub client: %v", err)
 	}