feat: Begins vendor views

Sources/App/Views/Vendors/VendorForm.swift

@@ -0,0 +1,37 @@
+import Elementary
+import ElementaryHTMX
+import SharedModels
+
+struct VendorForm: HTML {
+  let vendor: Vendor?
+
+  var content: some HTML<HTMLTag.form> {
+    form(
+      .id("vendor-form"),
+      vendor != nil ? .hx.put(targetURL) : .hx.post(targetURL),
+      .hx.target("this"),
+      .hx.swap(.outerHTML)
+    ) {
+      div(.class("row")) {
+        input(
+          .id("vendor-name"),
+          .name("name"),
+          .value(vendor?.name ?? ""),
+          .placeholder("Vendor Name"),
+          .required
+        )
+        button(.type(.submit), .class("btn-primary")) { buttonLabel }
+      }
+    }
+  }
+
+  private var buttonLabel: String {
+    guard vendor != nil else { return "Update" }
+    return "Create"
+  }
+
+  var targetURL: String {
+    guard let vendor else { return "/vendors" }
+    return "/vendors/\(vendor.id)"
+  }
+}