feat(combobox): implement component

[var-poro]

No description provided.

[dpellier]

From the doc:

• the font in the input is incorrect
• the outline square bottom borders stays after selection, should be round again when content is closed
• combobox root should be inline-block (see clearable example on the doc to see the issue)
• disabled style is incorrect
• item disabled example doesn't work
• exampe "Custom Item" is the static source parameter, we can't see the function used
• it feels weird to filter only by label when we have customRenderer
• example "Form Field" should add a label (try with FormFieldLabel and see if it focus the combobox on click, otherwise use a ComboboxLabel)
• "Controlled" is KO, Dog is not selected in the combobox on initial render
• Add !dev tag to "Controlled" to remove it from the list of doc page