Add slackProcessor function for handling Slack operations

- Implemented slackProcessor to validate Slack configuration and execute operations using SlackService.
- Added error handling for configuration validation and operation execution to ensure robust integration.
- Standardized response format for successful operations, including relevant metadata.

src/services/processors/slackProcessor.ts

@@ -0,0 +1,47 @@
+import { ExecutionContext, ExecutionPlan } from "../executionEngine";
+import { SlackService } from "../slack/SlackService";
+import { SlackConfig } from "../../types/slack";
+
+export default async function slackProcessor(
+  context: ExecutionContext,
+  plan: ExecutionPlan
+): Promise<any> {
+  const { config } = context;
+
+  try {
+    // Validate configuration
+    const service = new SlackService();
+    const validation = service.validateConfig(config as SlackConfig);
+
+    if (!validation.valid) {
+      throw new Error(
+        `Invalid Slack configuration: ${validation.errors.join(", ")}`
+      );
+    }
+
+    // Execute the operation
+    const result = await service.executeOperation(config as SlackConfig);
+
+    if (!result.success) {
+      throw new Error(result.error || "Slack operation failed");
+    }
+
+    // Return standardized response
+    return {
+      success: true,
+      operation: config.operation,
+      data: result.data,
+      channelId: result.metadata?.channelId,
+      messageTs: result.metadata?.messageTs,
+      userId: result.metadata?.userId,
+      executionTime: result.metadata?.executionTime,
+      type: "slack",
+    };
+  } catch (error) {
+    throw new Error(
+      `Slack operation failed: ${
+        error instanceof Error ? error.message : "Unknown error"
+      }`
+    );
+  }
+}