Highlight all identifers with same associated symbol

[bendtherules]

Example - https://ts-ast-viewer.com/#code/DYUwLgBAhhC8EEYDcAoA3iiWKkjeARFAM4AmBqAvigMYD2AdsXaAHTB0DmAFFAJRIgA

It would be nice to say, select first a, look at its symbol and somehow highlight all the other nodes (identifiers) which has the same symbol (match by symbol id??). So, in this case first and third a have same symbol, but second a is different.
Its fine if its not the default behaviour, just have some option or way to enable it.

Currently, its tedious to go through them manually and check the id.

Can help with the PR. Need some guidance to get started.