Add LLM doc (#26058)

* [WIP] Add LLM doc

* rename

* latex

* latex

* Fix more latex

* [LLMs] Getting most out of LLMS

* improve

* try again

* Apply suggestions from code review
Co-authored-by: Maria Khalusova <kafooster@gmail.com>
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>

* Update docs/source/en/llm_tutorial_optimization.md

* Apply suggestions from code review

* Apply suggestions from code review

* Apply suggestions from code review
Co-authored-by: Joao Gante <joaofranciscocardosogante@gmail.com>

* Apply suggestions from code review

* move file

---------
Co-authored-by: Maria Khalusova <kafooster@gmail.com>
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>
Co-authored-by: Joao Gante <joaofranciscocardosogante@gmail.com>

docs/source/en/_toctree.yml

@@ -209,6 +209,8 @@
     title: Pipelines for webserver inference
   - local: model_memory_anatomy
     title: Model training anatomy
+  - local: llm_tutorial_optimization
+    title: Getting the most out of LLMs
   title: Conceptual guides
 - sections:
   - sections: