Add feature to collapse/expand text (e.g. in issues)

[geerligs]

Feature Description

In Github it is possible to structure the text in issues using collapsing/expanding of sections.

The Github feature is using <details> and <summary> tags

Example (same as in screenshot):

Tips for collapsed sections

You can add a header

You can add text within a collapsed section.

You can add an image or a code block, too.

   puts "Hello World"

More info on https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/organizing-information-with-collapsed-sections

Screenshots

[wxiaoguang]

It is already supported in Gitea?

<details>

<summary> this is a summary </summary>

this is the detail

</details>

[geerligs]

Hello wxiaoguang,

you are right, it is already available!

Thanks for the feedback.

--Han