feat: add Home Page layout and styles, including header behavior and language support

packages/base/Configuration/Sets/SitePackage/TypoScript/Helper/PageClass.typoscript

@@ -0,0 +1,40 @@
+# PAGE CLASS
+lib.page.class = COA
+lib.page.class {
+    // Page alias or id as fallback
+    10 = TEXT
+    10 {
+        field = alias // uid
+        noTrimWrap = |page-||
+    }
+    // Current level of the page within the tree structure
+    20 = TEXT
+    20 {
+        data = level:1
+        noTrimWrap = | pagelevel-||
+    }
+    // Language
+    30 = TEXT
+    30 {
+        data = siteLanguage:languageId
+        noTrimWrap = | language-||
+    }
+    // Backend layout
+    40 = TEXT
+    40 {
+        data = pagelayout
+        replacement.10 {
+            search = pagets__
+            replace =
+        }
+        ifEmpty = default
+        noTrimWrap = | backendlayout-||
+    }
+    // Layout
+    50 = TEXT
+    50 {
+        field = layout
+        noTrimWrap = | layout-||
+        ifEmpty = default
+    }
+}