Update README files across examples to reflect new repository URL and…

[codepeeyush]

… installation instructions

• Changed the repository clone URL from yourgpt-copilot to copilot-sdk.
• Updated directory navigation commands to align with the new structure.
• Added installation commands for dependencies in each example's README.

BREAKING: None - changes are backward compatible.

Description

• The README for several examples in example directory had wrong repo name for copilot-sdk and directory respectively

Fixes #

Changes

• Changed the typo in example directory

Type of Change

• Minor

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring (no functional changes)

Testing

• I've tested this locally
• I've added/updated tests
• All existing tests pass

Checklist

• My code follows the project's style guidelines
• I've updated the documentation (if needed)
• I've added tests that prove my fix/feature works
• New and existing tests pass locally

[vercel]

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