remove instructions for cursor plugin

[k-bieniek]

No description provided.

[github-actions]

Rosetta Triage Review

Summary: This PR removes the Cursor plugin installation instructions from INSTALLATION.md, replacing them with a brief "Not available for now." notice.

Findings:

• The change is minimal and focused (1-line edit in a single file).
• The PR body is empty — there is no explanation of why the Cursor plugin is being removed or whether this is a temporary or permanent change.
• The replacement text "Not available for now." is vague; readers will not know if they should check back later, use an alternative, or if support was dropped entirely.

Suggestions:

• Add a brief PR description explaining the motivation (e.g., plugin deprecated, not yet published, support paused).
• Consider replacing the vague phrase with a more informative note, such as "Cursor plugin support is not currently available. Follow [issue #X] for updates." or pointing users to an alternative installation method.

Automated triage by Rosetta agent

[isolomatov-gd]

This is incorrect statement. Plugin exists, there is no way to install it manually right now and I agree with AI suggestions too

[isolomatov-gd]

@k-bieniek Please check comments