Update subscription docs

[roznawsk]

Description

and fix the "ask AI" button overlapping with the cookies

[linear]

FCE-3159 Update documentation for selective subscriptions

[Copilot]

Pull request overview

Updates the selective subscriptions documentation and adjusts styling to prevent the “Ask AI” floating button from overlapping the external cookies button.

Changes:

• Simplifies selective subscriptions docs by removing the “connected peers” note and the “Notes & limitations” section, keeping only an unsubscribe limitation note.
• Shifts the floating “Ask AI”/DocSearch sidepanel trigger to avoid overlapping the cookies UI, with a small desktop breakpoint tweak.
• Bumps Yarn version in package.json and updates the lockfile metadata accordingly.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/how-to/backend/selective-subscriptions.mdx	Removes the earlier connected-peers admonition and condenses limitations into a single unsubscribe note.
versioned_docs/version-0.26.0/how-to/backend/selective-subscriptions.mdx	Mirrors the same selective subscriptions doc edits for the v0.26.0 versioned docs.
src/css/custom.css	Moves the floating sidepanel trigger button left via right offset to avoid cookies button overlap (with a desktop media query adjustment).
package.json	Updates packageManager to yarn@4.14.1.
yarn.lock	Updates lockfile metadata version to match the Yarn upgrade.

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[PiotrWodecki]

Description
and fix the "ask AI" button overlapping with the cookies

thanks for that