feat: Moves vendor branch views to their own files, starts to implement snapshot testing for html

Sources/HtmlSnapshotTesting/HtmlSnapshotTesting.swift

@@ -0,0 +1,12 @@
+import Elementary
+@preconcurrency import SnapshotTesting
+
+public extension Snapshotting where Value == (any HTML), Format == String {
+  static var html: Snapshotting {
+    var snapshotting = SimplySnapshotting.lines
+      .pullback { (html: any HTML) in html.renderFormatted() }
+
+    snapshotting.pathExtension = "html"
+    return snapshotting
+  }
+}