llama.cpp now supports StarCoder model series

For the 1B version of the model, it operates at approximately 100 tokens per second when decoding with Metal on an Apple M2 Max.

llama_print_timings: load time = 114.00 ms

llama_print_timings: sample time = 0.00 ms / 1 runs ( 0.00 ms per token, inf tokens per second)

llama_print_timings: prompt eval time = 107.79 ms / 22 tokens ( 4.90 ms per token, 204.11 tokens per second)

llama_print_timings: eval time = 1315.10 ms / 127 runs ( 10.36 ms per token, 96.57 tokens per second)

llama_print_timings: total time = 1427.08 ms

(Disclaimer: I submited the PR)