Graph vertices antialiasing

Current graph UI looks not attractive, and it even hurts to look at. That’s mostly because of super crisp edges of vertices.

Consider adding antialiasing and remastering graph view in the future. Athen’s nice-looking graph view was the feature that almost made me to switch to it.

Opened a pull request https://github.com/logseq/logseq/pull/2679 that addresses this issue