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

Gemfile.lock

@@ -96,6 +96,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
+    chunky_png (1.4.0)
     concurrent-ruby (1.3.5)
     connection_pool (2.5.3)
     crass (1.0.6)
@@ -181,7 +182,6 @@ GEM
       minitest (>= 5.0)
       ruby-progressbar
     msgpack (1.8.0)
-    mysql2 (0.5.6)
     net-imap (0.5.9)
       date
       net-protocol
@@ -215,8 +215,16 @@ GEM
     parser (3.3.9.0)
       ast (~> 2.4.1)
       racc
+    pdf-core (0.10.0)
     pp (0.6.2)
       prettyprint
+    prawn (2.5.0)
+      matrix (~> 0.4)
+      pdf-core (~> 0.10.0)
+      ttfunk (~> 1.8)
+    prawn-qrcode (0.5.2)
+      prawn (>= 1)
+      rqrcode (>= 1.0.0)
     prettyprint (0.2.0)
     prism (1.4.0)
     propshaft (1.2.1)
@@ -279,8 +287,12 @@ GEM
     responders (3.1.1)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.4.1)
-    rubocop (1.80.0)
+    rexml (3.4.2)
+    rqrcode (3.1.0)
+      chunky_png (~> 1.0)
+      rqrcode_core (~> 2.0)
+    rqrcode_core (2.0.0)
+    rubocop (1.80.1)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -349,11 +361,14 @@ GEM
     stimulus-rails (1.3.4)
       railties (>= 6.0.0)
     stringio (3.1.7)
+    stripe (15.5.0)
     thor (1.4.0)
     thruster (0.1.15)
     thruster (0.1.15-aarch64-linux)
     thruster (0.1.15-x86_64-linux)
     timeout (0.4.3)
+    ttfunk (1.8.0)
+      bigdecimal (~> 3.1)
     turbo-rails (2.0.16)
       actionpack (>= 7.1.0)
       railties (>= 7.1.0)
@@ -402,10 +417,12 @@ DEPENDENCIES
   kaminari (~> 1.2)
   kaminari-tailwind (~> 0.1.0)
   minitest-reporters (~> 1.7)
-  mysql2 (~> 0.5)
+  prawn (~> 2.5)
+  prawn-qrcode (~> 0.5)
   propshaft
   puma (>= 5.0)
   rails (~> 8.0.2, >= 8.0.2.1)
+  rqrcode (~> 3.1)
   rubocop-rails-omakase
   selenium-webdriver
   solid_cable
@@ -413,6 +430,7 @@ DEPENDENCIES
   solid_queue
   sqlite3 (~> 2.7)
   stimulus-rails
+  stripe (~> 15.5)
   thruster
   turbo-rails
   tzinfo-data