chore: commit all missing files from Qute/Alpine migration

This commit adds all the files that were created during the frontend
migration (Qute templates + Alpine.js) but were never committed to git.

Includes:
- TemplateData.java (shared Qute page helpers)
- Static resources: app.js, defaults.js, calc.js, alpine.min.js, pico.min.css, favicon.svg
- Qute templates: changePassword, formulas, insumos, login, register, usuarios
- Partial templates: header.html, layout/base.html
- Modified: MustChangePasswordFilter.java (added login/register paths)
- Modified: AppState.java (added price fields)
- Modified: format.js (simplified number formatting)
- Modified: application.properties (static resources comment)
- Modified: calculadora.html (Qute/Alpine rewrite)

src/main/resources/application.properties

@@ -31,4 +31,7 @@ quarkus.http.auth.proactive=false
 app.bootstrap.admin.enabled=true
 app.bootstrap.admin.username=admin
 
+# Static resources are served from META-INF/resources/static/* by default.
+# Nothing else to configure.
+
 %native.quarkus.native.resources.includes=META-INF/resources/.*,publicKey.pem,privateKey.pem