feat(eslint-plugin-jest): add prefer-strict-equal rule

[eryue0220]

Summary

Port prefer-strict-equal from eslint-plugin-jest to rslint.

Related Links

Tracking issue: #476
eslint-plugin-jest/prefer-strict-equal doc code

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[gemini-code-assist]

Code Review

This pull request introduces a new Jest linting rule, prefer-strict-equal, which promotes the use of toStrictEqual() over toEqual() in expect() calls. The review identifies a bug where the rule incorrectly flags expect().not.toEqual() and provides a code suggestion to fix this by checking for the .not modifier. Additionally, it suggests adding test cases for this not modifier scenario in both the Go and TypeScript test suites to ensure correct behavior. The review also recommends enhancing the rule's documentation to provide a more detailed explanation of why toStrictEqual() is preferred, specifically regarding its handling of undefined properties.

[fansenze]

getElementAccessName in jest.go also supports ast.KindNoSubstitutionTemplateLiteral, which means expect(x)[toEqual](y) will produce a MemberEntry with Name: "toEqual" and Node.Kind: NoSubstitutionTemplateLiteral. This filter skips it silently, so the rule won't report on template-literal bracket access.

if kind != ast.KindIdentifier && kind != ast.KindStringLiteral && kind != ast.
KindNoSubstitutionTemplateLiteral {
    continue
}