llama : move vocab, grammar and sampling into separate files (#8508)

* llama : move sampling code into llama-sampling

ggml-ci

* llama : move grammar code into llama-grammar

ggml-ci

* cont

ggml-ci

* cont : pre-fetch rules

* cont

ggml-ci

* llama : deprecate llama_sample_grammar

* llama : move tokenizers into llama-vocab

ggml-ci

* make : update llama.cpp deps [no ci]

* llama : redirect external API to internal APIs

ggml-ci

* llama : suffix the internal APIs with "_impl"

ggml-ci

* llama : clean-up

Package.swift

@@ -4,6 +4,9 @@ import PackageDescription
 
 var sources = [
     "src/llama.cpp",
+    "src/llama-vocab.cpp",
+    "src/llama-grammar.cpp",
+    "src/llama-sampling.cpp",
     "src/unicode.cpp",
     "src/unicode-data.cpp",
     "ggml/src/ggml.c",