feat(eslint-plugin): add support for nested namespaces to unsafe-member-access (#9478)

* feat(eslint-plugin): add support for nested namespaces to unsafe-member-access

* docs(eslint-plugin): adjust selector explanation

Co-authored-by: Josh Goldberg ✨ <[email protected]>

---------

Co-authored-by: Josh Goldberg ✨ <[email protected]>

Author: JSanchezIO

packages/eslint-plugin/src/rules/no-unsafe-member-access.ts

@@ -107,8 +107,8 @@ export default createRule({
     }
 
     return {
-      // ignore MemberExpression if it's parent is TSClassImplements or TSInterfaceHeritage
-      ':not(TSClassImplements, TSInterfaceHeritage) > MemberExpression':
+      // ignore MemberExpressions with ancestors of type `TSClassImplements` or `TSInterfaceHeritage`
+      'MemberExpression:not(TSClassImplements MemberExpression, TSInterfaceHeritage MemberExpression)':
         checkMemberExpression,
       'MemberExpression[computed = true] > *.property'(
         node: TSESTree.Expression,

packages/eslint-plugin/tests/rules/no-unsafe-member-access.test.ts

@@ -60,6 +60,12 @@ class B implements FG.A {}
     `
 interface B extends FG.A {}
     `,
+    `
+class B implements F.S.T.A {}
+    `,
+    `
+interface B extends F.S.T.A {}
+    `,
   ],
   invalid: [
     {