Custom eslint rule for disallowing cross-package references

Summary:
Added infra for writing and using custom eslint rules and created a rule for disallowing cross-package file imports. Such imports are anti-pattern and they also break standalone plugin bundling.

We still have a bunch of places where Flipper core references code directly from plugins. I've ignored these places for now and added task T71355623 to revisit them.

Reviewed By: passy

Differential Revision: D22998955

fbshipit-source-id: d04cff8fc115ba1300a7e6830306ec134046e927

desktop/babel-transformer/src/electron-requires-main.ts

@@ -31,6 +31,7 @@ module.exports = () => ({
         node.callee.type === 'MemberExpression' &&
         node.callee.object.type === 'Identifier' &&
         node.callee.object.name === 'require' &&
+        node.callee.property.type === 'Identifier' &&
         node.callee.property.name === 'resolve' &&
         node.arguments.length === 1 &&
         node.arguments[0].type == 'StringLiteral'