chore: sync docs to main (#4418)

* docs: Add haystack note on using pipelines (GITBOOK-820)

* docs: Adding videos to relevant pages (GITBOOK-819)

* docs: Jeffrey's Aug 21 changes - Update section 2 to reflect time range (GITBOOK-822)

* docs: Anthropic Instrumentation - Phoenix (GITBOOK-824)

* docs: Anthropic tweaks - Phoenix (GITBOOK-825)

* docs: Fix Anthropic page - Phoenix (GITBOOK-826)

* docs: phoenix.otel quickstart changes (GITBOOK-828)

* docs: phoenix.otel guide (GITBOOK-829)

* docs: Beef up Tracing Overview page and refresh links (John reviewed) (GITBOOK-830)

* docs: re-name headers (GITBOOK-831)

* docs: No subject (GITBOOK-832)

* docs: Make integrations a Grid (GITBOOK-833)

* docs: vercel (GITBOOK-834)

* docs: Send Traces from Phoenix to Arize (GITBOOK-835)

* docs: Keep Send traces to Arize in Arize docs (GITBOOK-836)

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Co-authored-by: John Gilhuly <jgilhuly@arize.com>
Co-authored-by: David Burch <davidburch@arize.com>
Co-authored-by: Jeffrey Peng <jpeng@arize.com>
Co-authored-by: Parth Shisode <pshisode@arize.com>
Co-authored-by: Dustin Ngo <dngo@arize.com>
Co-authored-by: Dat Ngo <dat@arize.com>
Co-authored-by: Eric Xiao <exiao@arize.com>