feat: Adiciona form display do usuário com field_user_social_links

Move core.entity_form_display.user.user.default de base_site_config
para site_users, que é o módulo responsável pelos campos de perfil.
Inclui field_user_social_links (social_link_widget) e remove referência
obsoleta a field_user_photo.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config/optional/core.entity_form_display.user.user.default.yml

@@ -0,0 +1,48 @@
+langcode: pt-br
+status: true
+dependencies:
+  config:
+    - field.field.user.user.field_user_social_links
+  module:
+    - path
+    - social_link
+    - user
+id: user.user.default
+targetEntityType: user
+bundle: user
+mode: default
+content:
+  account:
+    weight: 0
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+  contact:
+    weight: 2
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+  field_user_social_links:
+    type: social_link_widget
+    weight: 16
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+  language:
+    weight: 1
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+  path:
+    type: path
+    weight: 9
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+  timezone:
+    weight: 3
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+hidden:
+  langcode: true