[Feat] ​Parent-Child Tagging (Nested Tags)

[AmIrbX]

Description

Hey, First of all what you've done is great and i'm enjoying it a lot. I used Obsidian for quite a lot of time and the feature i used often was parent-child tagging system. For example if i wanted i could use #music/metal to choose and tag each file and document thoroughly.
I am using AFFiNE for a week or two and this is what lacks the most for me personally.
This is the link to the Obsidian's nested tag feature. (Link)
If there's a feature similar to it i'd be grateful if someone tells me.

Use case

No response

Anything else?

No response

Are you willing to submit a PR?

• Yes I'd like to help by submitting a PR!