Allow tag messages to be spread across multiple lines

[Mr-Crabman]

Describe the improvement that you'd like
When adding an annotated tag, the optional "message" box should be able to expand (much like the commit message box) and have its message include newlines.

Additional context (optional)
Right now, the box doesn't seem to be able to accept multiple lines; pressing enter, even while shifting, just does nothing, and pasting in text that already has newlines erases the newlines.

I know it's possible to have newlines in the tag messages; for example, by doing git tag -a tag_name, VSCode opens up Nano to type out a message. Really, the only reason I ask for this improvement instead of just using that is because inputting markdown is impossible there (more specifically, the # symbol won't be included in the messages, because it's Nano).

[sjackson0109]

Multiple lines would work,
or multiple tags, stacked ontop of one another?
mermaid-js/mermaid#3801