use-cases/llm: add direct link to each language llm instrumentations docs

[xrmx]

Add direct link for Java and Python. In order to do that rework the java page to add an LLM instrumentations chapter.

Will need to add the same content for Node.js and link it. Added nodejs chapter too.

[elastic-acrolinx]

Acrolinx Scorecards

Select the total score link to review all feedback on clarity, consistency, tone, brand, terms, spelling, grammar, readability, and inclusive language. You should fix all spelling errors regardless of your total score. Fixing spelling errors helps maintain user trust in overall content quality.

Article	Total score (Required: 80)	Words + phrases (Brand, terms)	Correctness (Spelling, grammar)	Clarity (Readability)
✅ docs/_edot-sdks/java/supported-technologies.md	67	22	56	33
✅ docs/use-cases/llm/index.md	64	14	100	28

*TBD

[elastic-acrolinx]

Acrolinx Scorecards

Select the total score link to review all feedback on clarity, consistency, tone, brand, terms, spelling, grammar, readability, and inclusive language. You should fix all spelling errors regardless of your total score. Fixing spelling errors helps maintain user trust in overall content quality.

Article	Total score (Required: 80)	Words + phrases (Brand, terms)	Correctness (Spelling, grammar)	Clarity (Readability)
✅ docs/_edot-sdks/java/supported-technologies.md	67	22	56	33
✅ docs/_edot-sdks/nodejs/supported-technologies.md	62	24	53	30
✅ docs/use-cases/llm/index.md	64	14	100	28

*TBD