[NODE] Add Speech to text documentation

[ShambaC]

Node Config

{
    title: "Speech To Text",
    category: "audio",
    type: "speech_to_text",
    icon: {},
    desc: "Convert speech to text using Eleven Labs",
    credit: 100,
    inputs: [
        {
            desc: "The Flow to trigger",
            name: "Flow",
            type: "Flow",
        },
        {
            desc: "Link to the Audio to convert",
            name: "Audio Link",
            type: "Text",
        }
    ],
    outputs: [
        {
            desc: "Transcribed text",
            name: "Transcription",
            type: "Text",
        },
    ],
    fields: [
        {
            desc: "Link to the Audio to convert",
            name: "Audio Link",
            type: "Text",
            value: "Link here ...",
        },
        {
            desc: "Model to use for transcription",
            name: "Model",
            type: "select",
            value: "scribe v1",
            options: [
                "scribe v1",
                "scribe v1 experimental",
            ],
        },
    ],
    difficulty: "easy",
    tags: ["transcribe", "audio", "elevenlabs"],
}

Additional Information

Long Description:
Transcribe an audio file containing speech.

Use Cases:

• Transcribing videos to create subtitles
• Transcribing user speech to perform further task with what they said
• Create a voice activated agent

[github-actions]

✅ Documentation processed successfully!

A pull request has been created: #26

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