Added Double-fault handling

[ViktorPopp]

This pull request introduces support for handling double faults in InfinityOS by integrating concepts from the phill-opp blog_os "Double Faults" post. The changes include the following:

• Double Fault Handling: Implemented a handler for double faults, which occurs when an exception is triggered while handling another exception.
• Stack Protection: Added mechanisms to ensure that the kernel stack is not corrupted during a double fault, preventing system crashes.

Changes Made:

• Added a double fault handler to the interrupt handling code.
• Implemented stack protection during exception handling to prevent stack corruption.
• Updated kernel code to ensure that double faults are caught and handled without crashing the system.

Testing Instructions:

1. Build the OS using the cargo build command.
2. Run the OS on QEMU or another virtual machine to test double fault handling.
3. Trigger a double fault by causing an exception while another exception is being handled, and verify that the system handles it without crashing.

Impact:
This update adds critical support for handling double faults in InfinityOS, ensuring that the OS can recover from severe errors without crashing. It also improves system stability and prepares the OS for handling more complex exception scenarios in the future.