[Management] Allow management apps to register additional deepLinks

[tsullivan]

This issue proposes allowing plugins to create deepLinks for individual screens or tabs in their management UI.

Background

Today, the Management plugin registers with the Core Application service with an appUpdater$ that registers a single deepLink on behalf of consumers that register applications with the management plugin. (Link to the code)

However, there are times when a management app has multiple screens or tabs, and the plugins owners need deepLinks for navigation to take users directly to those screeen.

Proposal

Allowing plugins to configure their management apps with additional deepLink objects, would lead to consumer code registering management apps with something like:

  management?.sections.section.xyz.registerApp({
    id: 'myManagementApp',
    title: 'My Management App Title',
    mount: async (params) => {
      const { renderApp } = await getRenderApp();
      return renderApp(params);
    },
    deepLinks: [
      {
        id: 'knowledgeBase',
        title: 'Knowledge Base',
        path: '?tab=knowledge_base',
        keywords: 'blahblah',
      },
    ],
  });

[elasticmachine]

Pinging @elastic/kibana-management (Team:Kibana Management)