Add admin panel for users and votes

Closes #2

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.2].define(version: 2025_06_07_233053) do
+ActiveRecord::Schema[7.2].define(version: 2025_06_08_223006) do
   create_table "candidates", force: :cascade do |t|
     t.integer "vote_id"
     t.string "name"
@@ -45,6 +45,7 @@ ActiveRecord::Schema[7.2].define(version: 2025_06_07_233053) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.string "reset"
+    t.boolean "admin"
   end
 
   create_table "votes", force: :cascade do |t|