Educate developers on the existence of a native color picker

I'm glad to see that projects exist that refine and personalize the user experience. We should use them whenever the native experience is not satisfactory for UX purposes.

However, `type="color"` [exists](https://html.spec.whatwg.org/multipage/input.html#color-state-(type%3Dcolor)). And I strongly think that any introduction to a color-picking library should start by informing users of what exists and [how it is supported](https://caniuse.com/input-color) by current browsers (including the limitations).

This way, we ensure that the library always fulfills its objective of **improving the web**.

Review the library's existing introduction and usage documentation, then compare its color-picker guidance with the native HTML color input and the linked browser-support information. Done means the documentation explains type="color", its current support and limitations, before introducing color-picking libraries.

Written by the indexing model from the issue text.