docs: sync Feb 21, 2024 (#2343)

* docs: custom spans

* docs: fix the semantic conventions link (GITBOOK-496)

* docs: fix links to semantic conventions (GITBOOK-497)

* docs: No subject (GITBOOK-498)

* docs: No subject (GITBOOK-499)

* docs: revert changes from #499 (GITBOOK-500)

* docs: update model args (GITBOOK-502)

* docs: replace session with px.Client() (GITBOOK-504)

* docs: migrate to otel instrumentors (GITBOOK-503)

* docs: Q&A addition (GITBOOK-373)

* docs: Azure guidance (GITBOOK-505)

* docs: Fixed df name (GITBOOK-507)

* docs: llama-index 0.10 guidance (GITBOOK-508)

* docs: Moved up Telemtry (GITBOOK-509)

* docs: add dspy notebook link

* docs: add dspy integration (GITBOOK-510)

* docs: dspy tweaks (GITBOOK-511)

* docs: Fix typo on "string" (GITBOOK-512)

* docs: update markdownss for px.Client().log_evaluations() (#2313)

* docs: add log_evaluations to Client (GITBOOK-513)

* docs: No subject (GITBOOK-515)

* docs: fix .rst links to be .md (#2338)

* docs: Capitalizing Phoenix, removed duplicate sentence (GITBOOK-516)

* docs: Change Nav (GITBOOK-514)

* docs: Overview revamp (GITBOOK-518)

* docs: remove use-cases (GITBOOK-519)

* docs: Simplify environments (GITBOOK-520)

* docs: fix links (GITBOOK-522)

* docs: Add image (GITBOOK-523)

* docs: Fixed typo "grammatical" (GITBOOK-524)

* docs: delete obsolete exporter code (GITBOOK-525)

* Remove references to deprecated `processing` module in docs (#2422)

* docs: update install to include evals (GITBOOK-527)

* docs: fixed url typo (GITBOOK-528)

---------

Co-authored-by: Tammy Le <tammy@arize.com>
Co-authored-by: Roger Yang <roger.yang@arize.com>
Co-authored-by: Cameron Young <cam@arize.com>
Co-authored-by: Jason Lopatecki <jason@arize.com>
Co-authored-by: Alexander Song <axiomofjoy@gmail.com>
Co-authored-by: Xander Song <xsong@arize.com>
Co-authored-by: Roger Yang <80478925+RogerHYang@users.noreply.github.com>
Co-authored-by: Aparna Dhinakaran <aparna@arize.com>
Co-authored-by: Dustin Ngo <dustin@arize.com>