fix: Update overviewRulerColor docs

[Jason3S]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the documentation for the overviewRulerColor setting to remove the outdated “empty string” disable approach and add clear guidance on using cSpell.showInRuler to disable the ruler. Key changes include:

• Added cross-references to the cSpell.showInRuler toggle in JSDoc and schema files.
• Removed instructions about disabling the color via an empty string.
• Synchronized descriptions in package.json and multiple JSON schema sections.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
packages/_server/src/config/cspellConfig/AppearanceSettings.mts	JSDoc: added note on disabling the ruler via showInRuler.
packages/_server/spell-checker-config.schema.json	JSON schema: updated overviewRulerColor descriptions to mention showInRuler.
package.json	JSON metadata: synchronized overviewRulerColor markdown entries.

Comments suppressed due to low confidence (3)

packages/_server/spell-checker-config.schema.json:2665

• [nitpick] Add a blank line before “Disable the ruler...” to separate it as a new paragraph for better readability in the schema description.

"description": "The CSS color used to show issues in the ruler.\n\nDepends upon `#cSpell.useCustomDecorations#`. Disable the ruler by setting `#cSpell.showInRuler#` to `false`."

packages/_server/spell-checker-config.schema.json:2666

• [nitpick] Consider adding a blank line before “Disable the ruler...” in the markdownDescription to improve separation between paragraphs.

"markdownDescription": "The CSS color used to show issues in the ruler.\n\nDepends upon `#cSpell.useCustomDecorations#`.\nDisable the ruler by setting `#cSpell.showInRuler#` to `false`."

packages/_server/spell-checker-config.schema.json:2664

• The description for overviewRulerColor is duplicated across several schema definitions; consider centralizing it in a shared constant or using a $ref to reduce duplication and maintenance overhead.

"overviewRulerColor": {