Rename project from nginx-test to sqlite-serve

- Updated package name in Cargo.toml: nginx-test → sqlite-serve
- Updated library name: libnginx_test.dylib → libsqlite_serve.dylib
- Updated all load_module directives in nginx configs
- Updated build checks in start scripts
- Updated branding in footer template
- Updated project name in all README files

The name 'sqlite-serve' better reflects the module's purpose:
serving dynamic content from SQLite databases via NGINX.

README.md

@@ -1,4 +1,4 @@
-# nginx-test - SQLite Module for NGINX
+# sqlite-serve - SQLite Module for NGINX
 
 A dynamic NGINX module written in Rust that integrates SQLite databases with Handlebars templating, enabling data-driven web applications directly from NGINX configuration.
 
@@ -251,7 +251,7 @@ Request → NGINX → Module Handler → SQLite Query
 ## Project Structure
 
 ```
-nginx-test/
+sqlite-serve/
 ├── src/
 │   └── lib.rs                     # Module implementation
 ├── conf/