Add contestants

app/views/contestants/_form.html.slim

@@ -0,0 +1,17 @@
+= form_with model: contestant, url: url, method: method do |form|
+  .row.mb-3
+    .col
+      .form-floating
+        = form.text_field :name, autocomplete: "off", class: "form-control"
+        = form.label :name, class: "required"
+  .row.mb-3
+    .col
+      .form-floating
+        = form.text_field :email, autocomplete: "off", class: "form-control"
+        = form.label :email
+    .form-text Optional. Fill this only if you intend to send emails through this app.
+  .row.mt-4
+    .col
+      - if method == :patch
+        = link_to "Delete", contest_contestant_path(contest, contestant), data: { turbo_method: :delete }, class: "btn btn-danger me-2"
+      = form.submit submit_text, class: "btn btn-primary"