start splitting into classes; use env vars for foundation model file dependencies

.gitignore

@@ -175,5 +175,5 @@ cython_debug/
 
 # HuggingFace / Microsoft LLM supporting files
 # (these are downloaded for local development via bash script, or inside GH Action workflow context)
-src/**/cpu_and_mobile/cpu-int4-rtn-block-32-acc-level-4/**
+infrastructure/foundation_model/cpu_and_mobile/**
 logs