github newrelic/docs-website release-05.21.2025-10.16

🚀 What's new?

@alanwest - Update remove-applications-new-relic.mdx ->
@ubanerjeeNR - chore(drop-rules-api): EOL ->
@ubanerjeeNR - chore(eol drop rules): Added upcoming EOL note ->
@shevaun-nr - add logging to feature list under browser agent start() API ->
@nr-ahemsath - Add troubleshooting doc for app hang on startup issue ->
@cpearcey - Update php-agent-compatibility-requirements.mdx ->
@gmanandhar-nr - Merge pull request #20713 from newrelic/NR-416540-drop-rule-eol-content ->
@cbehera-newrelic - Merge pull request #20732 from cpearcey/patch-3 ->
@cbehera-newrelic - Merge pull request #20717 from shevaun-nr/update-browser-deferred-load-logging ->
@cbehera-newrelic - Merge pull request #20697 from newrelic/alanwest-patch-1 ->
@cbehera-newrelic - wip ->
@cbehera-newrelic - Merge pull request #20729 from nr-ahemsath/docs/dotnet-agent-troubleshooting-startup-hang-workaround ->

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