[NODE] Add Widget Trigger documentation

[ShambaC]

Node Config

{
    title: "Widget Trigger",
    category: "trigger",
    type: "widget_trigger",
    icon: {},
    desc: "Triggers the flow when a message is recieved from the support bot Widget",
    inputs: [
        {
            desc: "Intro message shown by the bot",
            name: "Intro",
            type: "Text",
        },
    ],
    outputs: [
        {
            desc: "The Flow to trigger",
            name: "Flow",
            type: "Flow",
        },
        {
            desc: "Message recieved by the bot",
            name: "Message",
            type: "Text",
        },
    ],
    fields: [
        {
            desc: "Intro message shown by the bot",
            name: "Intro",
            type: "Text",
            value: "Welcome! I'm your AI assistant. This is a demo workflow. Ask me anything!",
        },
    ],
    difficulty: "easy",
    tags: ["trigger", "support", "bot", "widget"],
}

Additional Information

Long Description:
Activates your workflow upon receiving a message from its corresponding widget. 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: #22

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