DCX Library Components - Accessibility issues against all current components

[ClaudioRicciCG]

Describe the bug
Following an Accessibility Audit across all current Components, a list of bugs to be addressed has been compiled

To Reproduce
[Steps to reproduce the behavior:]

1. Install and enable webaim.org Chrome extension in Chrome
2. Go to localhost://1234
3. Click on a listed component
4. Click on the Webaim Icon top right of Chrome.
5. View the Accessibility Warnings against the given component in the left hand panel.

Expected behavior
Once components have their Accessibility Issues fixed, the error count per Component in the Webaim extension should be zero.
Listed Issues

COMPONENT	ISSUES
radio	Fieldset aria-describedby is empty. Needs to refer to a css selector of DOM element that's innerHTML would address the value
Checkbox	Input type="checkbox" has aria-describedby is empty. Needs to refer to a css selector of DOM element that's innerHTML would address the value.	Is data-aria-controls needed? As it is empty for each checkbox.	labels should refer using the 'for' attribute to the input it is for by the inputs id.	Fieldset aria-describedby is empty. Needs to refer to a css selector of DOM element that's innerHTML would address the value
AutocompleteDemo	2 Empty buttons need 'aria-label="something descriptive" in place
ToggleDemo	label is missing a htmlFor attribute, which should reference the immediate child div which should have an id
FormDateDemo	9 Empty buttons need 'aria-label="something descriptive" in place
CopyToClipboardDemo	3 Empty buttons need 'aria-label="something descriptive" in place

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Desktop (please complete the following information):

• OS: Agnostic, any OS
• Browser: Chrome (for testing, though affects all browser and devices)
• Version: latest