feat: Implement complete event ticketing system with Stripe integration and email confirmations

- Enhanced events index page with improved visual design and better information display
- Completely redesigned event show page with modern layout, ticket selection, and checkout functionality
- Implemented Stripe payment processing for ticket purchases
- Created ticket generation system with PDF tickets and QR codes
- Added email confirmation system with ticket attachments
- Updated database configuration to use SQLite for easier development setup
- Fixed gem dependencies and resolved conflicts
- Improved error handling throughout the checkout process
- Enhanced Stimulus controller for ticket cart management
- Added proper redirect handling for successful and cancelled payments

db/schema.rb

@@ -11,7 +11,7 @@
 # It's strongly recommended that you check this file into your version control system.
 
 ActiveRecord::Schema[8.0].define(version: 2025_08_23_171354) do
-  create_table "events", charset: "utf8mb4", collation: "utf8mb4_uca1400_ai_ci", force: :cascade do |t|
+  create_table "events", force: :cascade do |t|
     t.string "name", null: false
     t.string "slug", null: false
     t.string "image"
@@ -33,7 +33,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_08_23_171354) do
     t.index ["user_id"], name: "index_events_on_user_id"
   end
 
-  create_table "ticket_types", charset: "utf8mb4", collation: "utf8mb4_uca1400_ai_ci", force: :cascade do |t|
+  create_table "ticket_types", force: :cascade do |t|
     t.string "name"
     t.text "description"
     t.integer "price_cents"
@@ -50,7 +50,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_08_23_171354) do
     t.index ["sale_start_at"], name: "index_ticket_types_on_sale_start_at"
   end
 
-  create_table "tickets", charset: "utf8mb4", collation: "utf8mb4_uca1400_ai_ci", force: :cascade do |t|
+  create_table "tickets", force: :cascade do |t|
     t.string "qr_code"
     t.integer "price_cents"
     t.string "status", default: "active"
@@ -63,7 +63,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_08_23_171354) do
     t.index ["user_id"], name: "index_tickets_on_user_id"
   end
 
-  create_table "users", charset: "utf8mb4", collation: "utf8mb4_uca1400_ai_ci", force: :cascade do |t|
+  create_table "users", force: :cascade do |t|
     t.string "email", default: "", null: false
     t.string "encrypted_password", default: "", null: false
     t.string "reset_password_token"