Move VS Code configuration to .dev/vscode/

[Thinkersbluff]

Move VS Code development configuration to .dev directory.

Tasks:

• Move .vscode/c_cpp_properties.json → .dev/vscode/c_cpp_properties.json
• Move .vscode/extensions.json → .dev/vscode/extensions.json
• Move .vscode/launch.json → .dev/vscode/launch.json
• Move .vscode/settings.json → .dev/vscode/settings.json

Acceptance Criteria:

• All VS Code config files moved
• Configuration preserved

Dependencies: Create .dev/ directory structure
Estimate: 1 story point

[Thinkersbluff]

Accidentally created - cleaning up