Create .dev/ directory structure

[Thinkersbluff]

Create the new development environment configuration directory structure.

Tasks:

• Create .dev/ root directory
• Create .dev/vscode/ subdirectory
• Create .dev/github/ subdirectory
• Add .gitkeep files to maintain empty directories

Acceptance Criteria:

• All directories exist
• Structure ready for development config files
• Empty directories preserved with .gitkeep

Estimate: 1 story point

[Thinkersbluff]

Apologies - this issue was created accidentally during testing of repository automation scripts. This issue has been removed as it was not intended for this repository.