feat: Added Attribute Comparison docs

[sfanahata]

DESCRIBE YOUR PR

Added new feature Attribute Comparison docs

Main update: https://sentry-docs-git-attribute-comparison-docs.sentry.dev/product/explore/trace-explorer/#compare-attributes-beta

https://sentry-docs-git-attribute-comparison-docs.sentry.dev/product/sentry-basics/performance-monitoring/#3-trace-explorer-find-root-causes--common-patterns-for-performance-issues

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Project	Deployment	Review	Updated (UTC)
sentry-docs	Ready	Preview, Comment	Dec 17, 2025 0:45am

1 Skipped Deployment

Project	Deployment	Review	Updated (UTC)
develop-docs	Ignored	Preview	Dec 17, 2025 0:45am

[aayush-se]

Left a few suggestions over slack thread