Add slug to categories

Forgot to give categories a slug before, so this adds it. While
we're at it, we'll remove vim's swapfiles from the repo too.

.gitignore

@@ -1 +1,3 @@
 vendor/
+*.swp
+*.swo

models/category/columns.yaml

@@ -9,6 +9,10 @@ columns:
     title:
         label: Title
         searchable: true
+    slug:
+        label: Slug
+        searchable: false
     description:
         label: Description
         searchable: false
+        invisible: true

models/category/fields.yaml

@@ -6,6 +6,13 @@ fields:
     title:
         label: Title
         required: true
+    slug:
+        label: Slug
+        required: true
+        attributes:
+            data-input-preset: 'input[name="Category[title]"]'
+            data-input-preset-type: 'slug'
+            data-input-preset-closest-parent: 'form'
     description:
         label: Description
         type: textarea

updates/create_categories_table.php

@@ -13,6 +13,7 @@ public function up()
             $table->engine = 'InnoDB';
             $table->increments('id');
             $table->string('title')->index();
+            $table->string('slug')->unique();
             $table->string('description')->nullable();
             $table->timestamps();
         });