Add project creation ui and new welcome screen.

[mohsenD98]

🚀 Description

This pull request introduces major enhancements to QField, focusing on improving the user experience and the project creation workflow.
⚠️ Note: It's not fully functional yet; upcoming PRs will connect the core logic to this UI.

✨ Key Changes

1. Redesigned Welcome Screen
   Updated to include the new "Create new project" button for easier access.

2. Project Creation UI
   Provides an intuitive interface for creating new projects with the following options:

   • Project Name – Specify a custom project name.
   • Basemap Selection – Choose from predefined basemaps, a blank map, or provide a custom URL.
   • Take Notes – Enable note-taking with optional media attachments.
   • Track Position – Record location automatically with configurable settings.
   • QFieldCloud Integration – Enable backup and collaboration through QFieldCloud.

3. Introduce QfExpandableGroupBox.qml
   Collapsible and expandable group box with check property and automatic height, used across the project creation UI.

🎬 Demo

Screencast.From.2025-09-19.17-38-19.webm

[duke-nyuki]

Task linked: QF-5384 Create project from wizard and/or template shipped with QField

[qfield-fairy]

🎉 Ta-daaa, freshly created APKs are available for 009e318: arm64-android

Other architectures

• arm-neon-android
• x64-android
• x86-android
• all access arm64-android
• all access arm-neon-android
• all access x64-android
• all access x86-android