Read Files Using UEFI Simple File System Protocol

Simulate UEFI file I/O in C.

Requirements:

• Define EFI_FILE_PROTOCOL structure
• Implement file_open(path, mode)
• Implement file_read(buffer, size)
• Implement file_get_size()
• Implement file_close()
• Implement dir_read() that lists directory entries
• Simulate loading a kernel file
• Show file info (name, size, attributes)
• Show path handling
• Show error handling for file not found

Test:

• Show file opened
• Show size retrieved
• Show file read
• Show directory listed
• Show kernel loaded