build: add custom linting for symbol names #19811
Merged
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As discussed, we want to prefix some exported class names with an underscore so it's more obvious that they're private. The problem is that our current class naming rule doesn't allow for a class to start with an underscore. These changes add a custom rule that can use a regex to validate the class name. Having our own rule allows us to validate more types of nodes as well (e.g.
type
nodes which tslint doesn't check).