Add text tool with rich editor

[Microck]

Description

Add a text tool with rich in-app editor accessible via key 5.

Type of Change

• New feature (non-breaking change which adds functionality)

Changes Made

• Add text tool to tool selector with SVG icon
• Create in-app text entry overlay (no browser prompts)
• Support font family, size, weight, italic, alignment options
• Add stroke/outline toggle with width control
• Implement click-to-edit existing text
• Add cursor preview support

Testing

• Tested in Firefox

Test Configuration:

• OS: Windows 10
• Browser: Firefox

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have tested my changes thoroughly

Related Issues

N/A