Issue #2291223 by slashrsm: Initial EntityBrowser entity.
Issue #2291223 by slashrsm: Add EntityBrowserDisplay plugin.
Issue #2291223 by slashrsm: Add display to entity browser config entity.
Issue #2291223 by slashrsm: Add EntityBrowserTab.
Issue #2291223 by slashrsm: Fix typo.
Issue #2291223 by slashrsm: Rename tabs to widgets.
Issue #2291223 by slashrsm: Add selection display plugin manager, interface and annotation object.
Issue #2291223 by slashrsm: Add widget selector plugin.
Issue #2291223 by slashrsm: Add configuration schema and bags for all plugins.
Issue #2291223 by slashrsm: Match class member names with config schema.
Issue #2291223 by slashrsm: Add another directory level for all entity browser plugin types.
Merge pull request #2 from slashrsm/2291223_entity_browser

2291223 entity browser