69. Validate Frame Size

Your device communicates with a sensor that requires each packet to be exactly 12 bytes.

Packets are represented in code using a struct named Frame.

You must define this struct and ensure—using static_assert—that its size matches the expected packet size (12 bytes).
If the size is wrong, the program must fail to compile.

Packet Format (Total = 12 bytes):

Your job:

• Define the struct Frame following the exact layout above.
• Use static_assert(sizeof(Frame) == 12) to validate correctness.
• If the struct is correct, the program prints "Frame OK".

Example Output:

Frame OK 

Constraints:

• You must not modify main().
• The struct must match the exact byte layout (no extra fields).
• Padding must not break the size.
• Use uint8_t and uint16_t exactly as shown.