[NODE] Add Chatbot Trigger documentation

[ShambaC]

Node Config

{
    title: "Chat Bot Trigger",
    category: "trigger",
    type: "chatbot_trigger",
    icon: {},
    desc: "Triggers the flow when a message is recieved from the Chat Bot UI",
    inputs: [],
    outputs: [
        {
            desc: "The Flow to trigger",
            name: "Flow",
            type: "Flow",
        },
        {
            desc: "Message recieved by the bot",
            name: "Message",
            type: "Text",
        },
    ],
    fields: [],
    difficulty: "easy",
    tags: ["trigger", "chat", "bot"],
}

Additional Information

Long Description:
Activates your workflow upon receiving a message from its corresponding chat UI. Allows you to perform task based on the text sent by user.

Use Cases:

• Creating custom chatbots with specific knowledge base
• Perform agentic tasks intelligently with chat commands
• Create an intelligent assistant

[github-actions]

✅ Documentation processed successfully!

A pull request has been created: #15

The node documentation will be reviewed and merged if everything looks correct.