feat: implement file copy functionality with recursive path resolution

[rcv-goku]

This PR adds comprehensive file copy functionality to the IIS Terraform provider
with improved path resolution and fixes critical provider configuration issues
for multi-server deployments.

🚀 New Features

File Copy Operations

• Recursive Path Resolution: Implemented comprehensive findFileByPath function that recursively searches the entire file system to locate files by physical path
• Direct Path Configuration: File copy resources now accept file paths directly instead of requiring pre-resolved IDs
• Multi-Server Support: File copy operations work seamlessly across multiple IIS server instances

Provider Configuration Improvements

• Fixed Alias Configuration: Corrected provider alias setup to properly support multiple server instances
• Subdomain Host Support: Resolved "unsupported protocol scheme" errors when using subdomain hosts
• Enhanced State Management: Improved resource state handling to prevent "Root object was present, but now absent" errors

Infrastructure Protection

• System Resource Protection: Added documentation and safeguards for critical IIS resources like DefaultAppPool and Default Web Site
• Import Block Resilience: Removed dependency on importing existing resources, making configuration more robust
• Dependency Management: Proper resource dependencies to ensure correct creation/destruction order

🐛 Bug Fixes

• Fixed findFileByPath function that was incomplete and causing 404 errors
• Resolved provider configuration issues with aliased providers
• Fixed file copy resource state management preventing successful resource creation
• Corrected import blocks referencing non-existent destroyed resources

📝 Technical Changes

• Added recursive directory traversal with case-insensitive path matching
• Enhanced error handling with detailed logging for debugging
• Simplified Terraform configuration by removing complex ID resolution locals
• Added missing imports (fmt, strings) to provider code

✅ Testing

• Successfully tested file copy from C:\ProgramData\GuestConfig\Configuration\ProjectPulse\Modules\AdditionalFiles\default.aspx to C:\inetpub\ProjectPulse\
• Verified multi-server deployment (server1 and server2) functionality
• Confirmed proper website status handling (Default Web Site stopped, ProjectPulse started)
• Validated certificate binding and SSL configuration