Refactor Llama generator, helpers, and build assets

make Gemma 4 the default model, enable thinking mode
style updates

pipeline/.clang-tidy

@@ -1,17 +1,37 @@
----
 Checks: >
   -*,
   bugprone-*,
-  clang-analyzer-*,
-  cppcoreguidelines-*,
   google-*,
   modernize-*,
-  performance-*,
   readability-*,
-  -cppcoreguidelines-avoid-magic-numbers,
-  -cppcoreguidelines-owning-memory,
-  -readability-magic-numbers,
-  -google-readability-todo
-HeaderFilterRegex: "^(src|includes)/.*"
-FormatStyle: file
-...
+  cppcoreguidelines-*,
+  -modernize-use-trailing-return-type,
+  -google-runtime-references
+
+CheckOptions:
+  # Enforce Google Naming Conventions
+  - key: readability-identifier-naming.ClassMemberCase
+    value: snake_case
+  - key: readability-identifier-naming.ClassMemberSuffix
+    value: _
+  - key: readability-identifier-naming.ClassCase
+    value: PascalCase
+  - key: readability-identifier-naming.FunctionCase
+    value: PascalCase
+  - key: readability-identifier-naming.StructCase
+    value: PascalCase
+  - key: readability-identifier-naming.VariableCase
+    value: snake_case
+  - key: readability-identifier-naming.GlobalConstantCase
+    value: kPascalCase
+
+  # Ensure C++20 Modernization
+  - key: modernize-make-unique.MakeSmartPtrFunction
+    value: std::make_unique
+  - key: modernize-make-shared.MakeSmartPtrFunction
+    value: std::make_shared
+  - key: modernize-use-override.IgnoreDestructors
+    value: "false"
+
+# Warnings as Errors to ensure compliance during build
+WarningsAsErrors: "*"