Allow user to copy code template

[jeremietisserand]

Feature :
As a tikui user
I can copy template code
To paste it in the tikui consumer application

Acceptance criteria
Given I go to the template page of a button atom
When I click on the copy button of the button atom
Then The template code is available in the clipboard

[Gnuk]

Maybe see tikui/tikui#28 because I think it will be inside the module.

[Gnuk]

Interesting to do but from tikui/tikuidoc-tikui

[nonomoho]

Hello @jeremietisserand !
I take it with @hugojeanmaire1 and the support of @Gnuk :
cf #69
https://gitlab.com/tikui/tikui.org/-/merge_requests/24