[ Suggestion ] Is there any way to support multi layer tags ?

The more we know about your system and use case, the more easily and likely we can help.

#### Environment info
* OS: Windows 10
* App Version (Lepton v1.10.0):

#### Description of the problem / feature request / question:

The default format is : [ title ] desc \#tag1 \#tag2 \#tag3

Is there any way to write the tags like '\#tag1/subtag2/subtag3\#' ?
And then the "TAGS" should be :
layer 1: tag1
layer 2: subtag2
layer 3: subtag3

For example, in this screenshot below:
the layer 1 tag is "linux",
the layer 2 tag is "service",
the layer 3 tag is "squid" and other.

It is like the folder layer.