refactor: replace types/eslint-scope.d.ts with @types/eslint-scope

[michaelfaith]

This change re-adds @types/eslint-scope and replaces the custom types added while fixing the repo's build errors, following the fix from DefinitelyTyped/DefinitelyTyped#74308 being merged.

Fixes #582

[Copilot]

Pull request overview

This PR replaces the custom types/eslint-scope.d.ts type definitions with the official @types/eslint-scope package, following a fix in DefinitelyTyped that resolved type incompatibilities between eslint-scope and ESLint's built-in types.

Changes:

• Removes custom type definitions file that was created as a temporary workaround
• Adds @types/eslint-scope v8.4.0 and downgrades eslint-scope from v9.1.0 to v8.4.0 to align with ESLint v9
• Removes no-longer-needed dependencies (@types/esrecurse and eslint-visitor-keys)

Reviewed changes

Copilot reviewed 1 out of 3 changed files in this pull request and generated no comments.

File	Description
types/eslint-scope.d.ts	Removes entire custom type definitions file (544 lines) that was a temporary workaround
tsconfig.json	Removes path mapping for eslint-scope that pointed to the custom types file
package.json	Adds @types/eslint-scope, adjusts eslint-scope version to 8.4.0, removes @types/esrecurse and eslint-visitor-keys

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