Migration notice for binary filenames

[2024 Jun 12] Binaries have been renamed w/ a llama- prefix. main is now llama-cli, server is llama-server, etc (https://github.com/ggml-org/llama.cpp/pull/7809)

This migration was important, but it is a breaking change that may not always be immediately obvious to users.

Please update all scripts and workflows to use the new binary names.

Old Filename	New Filename
main	llama-cli
server	llama-server
llama-bench	llama-bench
embedding	llama-embedding
quantize	llama-quantize
tokenize	llama-tokenize
export-lora	llama-export-lora
libllava.a	libllava.a
baby-llama	llama-baby-llama
batched	llama-batched
batched-bench	llama-batched-bench
benchmark-matmult	llama-benchmark-matmult
convert-llama2c-to-ggml	llama-convert-llama2c-to-ggml
eval-callback	llama-eval-callback
gbnf-validator	llama-gbnf-validator
gguf	llama-gguf
gguf-split	llama-gguf-split
gritlm	llama-gritlm
imatrix	llama-imatrix
infill	llama-infill
llava-cli	llama-llava-cli
lookahead	llama-lookahead
lookup	llama-lookup
lookup-create	llama-lookup-create
lookup-merge	llama-lookup-merge
lookup-stats	llama-lookup-stats
parallel	llama-parallel
passkey	llama-passkey
perplexity	llama-perplexity
q8dot	llama-q8dot
quantize-stats	llama-quantize-stats
retrieval	llama-retrieval
save-load-state	llama-save-load-state
simple	llama-simple
speculative	llama-speculative
vdot	llama-vdot
tests/test-c.o	tests/test-c.o