Add Admin View for Cloud Services

Add UI that allows configuring OAuth 2 Service Providers and Tokens
(see JSF UI: https://nightly.nuxeo.com/nuxeo/nxadmin/default/default-domain@view_admin?tabIds=NUXEO_ADMIN%3AOAuthOpensocial%3ANuxeoServerKey)

Layout

New Entry "Cloud Services" in the Admin Menu

In the Cloud Services page, 4 Pills available in the header toolbar: Server Key / Providers / Tokens / Consumers.

Server Key

In a paper-card, display the label & the value of the 2 rows.
See nuxeo-picture-info.html for a layout & styling example.

Providers

2 paper-cards => OAuth1 Service Providers and OAuth2 Service Providers, h3 titles.
In each paper-card, you have a ADD button on the right side, + a class .empyResult on the sentence when there is no provider defined.
When adding a new provider, a popup opens with the form to fill, with a ADD class .primary and Cancel buttons in a .buttons bar.
The .buttons bar should be styled with background-color: var(--nuxeo-dialog-buttons-bar, white);.

Then, I don't have any short term solution for the giant table, let's see the result together.

Tokens

2 paper-cards => OAuth1 Service Providers Tokens and OAuth2 Service Providers Token, h3 titles.
In each paper-card, you have a class .empyResult on the sentence when there is no token registered.
Don't know if we still need the refresh buttons in webui, if not let's remove them.

Consumers

2 paper-cards => OAuth1 Consumers and OAuth2 Clients, h3 titles.
In each paper-card, you have a ADD button on the right side, + a class .empyResult on the sentence when there is no consumers/clients set.
When adding a new provider, a popup opens with the form to fill, with a ADD class .primary and Cancel buttons in a .buttons bar.
The .buttons bar should be styled with background-color: var(--nuxeo-dialog-buttons-bar, white);.

Then, I don't have any short term solution for the giant table, let's see the result together.