Added support for customizable tooltip

[determinationlove]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[X] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

The current tooltip simply adds a <title> svg tag to the Label element.
But users usually need tooltips to view richer information than simply displaying labels.
React has a lot of tooltip libs, and we need to be able to support using these libs directly without having to reinvent the wheel ourselves.

Issue Number: #184

What is the new behavior?

I changed the Node component and added a new prop tooltip. Tooltip components from other libs can be passed directly into Node.

I placed the preview results of this feature in CustomElements of Basic.stories.tsx and NodeRearranging of Drag.stories.tsx.
The third-party tooltip lib used for demonstration uses Antd.

Does this PR introduce a breaking change?

[ ] Yes
[X] No

Other information

This is my first time contributing to an open source project 🙏

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[amcdnl]

Can you use reablocks tooltip? This projecty already uses it.

[determinationlove]

I tried it but I have a problem when using component of reablocks in reaflow

I'm trying to import reablocks Popover into Basic.stories.tsx
Error screams at me right now:

useTheme must be used within a ThemeProvider

I really don’t know how to solve this Error. using other third-party libraries to achieve custom tooltips doesn’t have this problem at all and can be achieved quickly.

[amcdnl]

Take a look at how we did it in reaviz - https://github.com/reaviz/reaviz/blob/master/src/common/Tooltip/ChartTooltip.tsx#L41

[determinationlove]

ok, I've changed Node's tooltip props demo to use reablocks.

• Added tailwindcss
• Modify postcss.config.cjs to make Tailwind style take effect
• Modify .storybook/preview.tsx to make stories use reablocks Theme

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edit: I just forgot that Drag also has tooltip demo, I fixed it and force push.