Update README: add RAG-Grounded pipelines 07 & 08

Add Job 08: RAG-Grounded Embeddings launcher

Add Job 07: RAG-Grounded SFT launcher

Add Pipeline 07: RAG-Grounded SFT (RAFT + Backtranslation + AgentInstruct)

Add Pipeline 08: RAG-Grounded Embeddings (grounded triplets from real docs)

Add HF Jobs launch commands and job scripts documentation to README

Add launcher.py

Add jobs/job_06_filter.py

Add jobs/job_05_glan.py

Add jobs/job_04_evol.py

Add jobs/job_03_personas.py

Add jobs/job_02_embedding.py

Add jobs/job_01_magpie.py

Add pipelines/06_quality_filter.py

Add pipelines/05_glan_es.py

Add pipelines/04_evol_instruct.py

Add pipelines/03_personas_es.py

Add pipelines/02_embedding_triplets.py

Add pipelines/01_magpie_sft.py

Add comprehensive README with pipeline documentation and references

initial commit