Diagram Editor App with the following Features:

1. [x] Create,Update,Delete Mermaid Documents
2. [x] Share Documents with iCloud
3. [x] OpenAI integration
> **You MUST HAVE a valid [OpenAI] API KEY (i.e. Paid Account)** to use this feature. Such secrets will be stored in device's keychain
4. [x] Drawing
* Draw Diagram using either Pencil or Fingers.
* Processing hand drawn diagram through [OpenAI Vision API] (_gpt-4o_) to automatically genearte Mermaid script.
* Mermaid script will include also a legend with detailed description of drawing.
5. [x] Prompt
* Prompt your diagram request in natural language
* Undo Prompt
* Prompt's History
* choose AI Model (_gpt-4o-mini or gpt-4o_)
4. [x] Text Editor
* Auto save over modification
* Provide **syntax highlighting** and auto completion **diagram snippets** through [ace] editor
5. Diagram Preview
* Scale to fit
* Share Image (AirDrop, iCloud, Other App, ...)