AI Skills - update code snippets and remove duplicated text

[igdmdimitrov]

Multiple PowerShell Copy-Item -Recurse commands in Option C were producing incorrect directory structures, and a duplicate Tip block was present.

• Bulk copy command: Changed from Copy-Item -Recurse node_modules\igniteui-angular\skills\* .agents\skills\ to Copy-Item -Recurse node_modules\igniteui-angular\skills .agents\skills — the * wildcard with -Recurse was flattening the directory structure instead of preserving subdirectories
• Individual copy commands: Added explicit destination folder names to all three Copy-Item commands (e.g. .agents\skills\ → .agents\skills\igniteui-angular-components)
• Duplicate Tip block: Removed a duplicate "Tip for VS Code" that was identical to the "Tip" block immediately below it

All code snippets now produce the expected directory structure:

.agents\
  skills\
    igniteui-angular-components\
    igniteui-angular-grids\
    igniteui-angular-theming\