Updated form logic, UI layout, and bounding box map integration

[MohdNishan]

• Fixed form logic for required and optional inputs.
• Updated multipart and subscriberUri handling.
• Repositioned “Add Process” button beside “HELP”.
• Improved HELP documentation.
• Bounding Box detected with the new schema.
• Added an interactive Leaflet-based map popup for selecting and updating bounding box inputs in the OGC Execute UI.