feat(17-04): menu plugin admin with registry types, URL checks and tree reorder

- golem15.menu plugin, tables golem15_menu_menus and golem15_menu_menu_entries with the PHP columns plus a nullable url_pattern (D-02)
- MenuEntry BeforeSave ports PHP beforeSave: nest columns 0, menu from the parent, sort_order after the menu's last
- entry type dropdown: url, divider and the signpost registry types; reference depends on type through signpost.ReferenceOptions
- URL scheme allowlist (errors.url_scheme), target _self or _blank, menu and parent cycle checks
- menu filter, toolbar reorder/create/delete and config_reorder.yaml partitioned by menu
- navigation Menus with Menus and Menu entries, permission golem15.menu.manage_menu, en and pl phrasebooks
- TestMenuAdminSmoke

models/menuentry/columns.yaml

@@ -0,0 +1,34 @@
+# ===================================
+#  List Column Definitions
+# ===================================
+
+columns:
+    id:
+        label: golem15.menu::lang.models.general.id
+        searchable: true
+    menu:
+        label: golem15.menu::lang.models.menuentry.menu
+        searchable: true
+        relation: menu
+        select: name
+    title:
+        label: golem15.menu::lang.models.menuentry.title
+        searchable: true
+    type:
+        label: golem15.menu::lang.models.menuentry.type
+        searchable: true
+    url:
+        label: golem15.menu::lang.models.menuentry.url
+        searchable: true
+    is_published:
+        label: golem15.menu::lang.models.menuentry.is_published
+        type: switch
+    created_at:
+        label: golem15.menu::lang.models.general.created_at
+        type: datetime
+        sortable: true
+        invisible: true
+    updated_at:
+        label: golem15.menu::lang.models.general.updated_at
+        type: datetime
+        sortable: true

models/menuentry/fields.yaml

@@ -0,0 +1,77 @@
+# ===================================
+#  Form Field Definitions
+# ===================================
+#
+# Adapted from the WinterCMS form: the "Menu Entry Options" tab is flattened,
+# the "Children" tab and partial are gone (the reorder page replaces them),
+# menu is a relation field (it is also the reorder partition), the type
+# options are the built-ins plus the registry types, and reference,
+# url_pattern and target are new.
+
+fields:
+    menu:
+        label: golem15.menu::lang.models.menuentry.menu
+        comment: golem15.menu::lang.models.menuentry.menu_comment
+        type: relation
+        nameFrom: name
+        span: full
+    parent:
+        label: golem15.menu::lang.models.menuentry.parent
+        type: relation
+        nameFrom: title
+        emptyOption: backend::lang.form.none
+        span: left
+    type:
+        label: golem15.menu::lang.models.menuentry.type
+        type: dropdown
+        options: getTypeOptions
+        default: url
+        required: true
+        span: right
+    title:
+        label: golem15.menu::lang.models.menuentry.title
+        type: text
+        span: left
+    url:
+        label: golem15.menu::lang.models.menuentry.url
+        comment: golem15.menu::lang.models.menuentry.url_comment
+        type: text
+        span: right
+    reference:
+        label: golem15.menu::lang.models.menuentry.reference
+        comment: golem15.menu::lang.models.menuentry.reference_comment
+        type: dropdown
+        dependsOn: type
+        emptyOption: backend::lang.form.none
+        span: left
+    url_pattern:
+        label: golem15.menu::lang.models.menuentry.url_pattern
+        comment: golem15.menu::lang.models.menuentry.url_pattern_comment
+        type: text
+        span: right
+    code:
+        label: golem15.menu::lang.models.menuentry.code
+        type: text
+        span: left
+    icon:
+        label: golem15.menu::lang.models.menuentry.icon
+        type: text
+        span: right
+    css_class:
+        label: golem15.menu::lang.models.menuentry.css_class
+        type: text
+        span: left
+    target:
+        label: golem15.menu::lang.models.menuentry.target
+        type: dropdown
+        default: _self
+        span: right
+        options:
+            _self: golem15.menu::lang.models.menuentry.target_self
+            _blank: golem15.menu::lang.models.menuentry.target_blank
+    is_published:
+        label: golem15.menu::lang.models.menuentry.is_published
+        type: switch
+        default: true
+        context: update
+        span: left