[feat](@svelteui/core): Collapse component

[BeeMargarida]

Description

New component Collapse, that allows for a section of content to collapse, occupying no space in the document. It will be useful for future component Accordion.

https://github.com/svelteuidev/svelteui/assets/25725586/380a1738-7836-4afa-a3c8-807f189c6917

Before submitting the PR, please make sure you do the following

• [x] Read the Contributing guide
• [x] Prefix your PR title with [@svelteui/core], [@svelteui/actions], [@svelteui/motion], [@svelteui/core], [core], or [docs].
• [x] Include a description of the changes made in the PR description and in the commit messages.
• [x] Include screenshots/videos of the changes made.
• [x] Verify that the linter and tests are passing, with yarn lint and yarn test or just run yarn prepush.