Reescrita dos geradores: biblioteca IGenerator, minimal API e novo frontend

- GeradoresService: cada tipo passa a ser um IGenerator (NIF, NIPC, NISS, CC,
  passaporte, IBAN, NIB, cartões, referência MB, pessoa, telefone, código postal,
  email, matrícula, EAN, UUID) registado em GeneratorRegistry; remove DAL/EF
- GeradoresWS: minimal APIs em /api/v1 com OpenAPI + Scalar e health check
- UnitTest: testes de ida e volta, valores conhecidos, detecção e API
- geradoresfe: UI construída a partir dos metadados da API, validador livre,
  exportação CSV/JSON/TXT, nginx com API_UPSTREAM configurável
- Docker, docker-compose e Jenkinsfile actualizados

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

GeradoresWS/Properties/launchSettings.json

@@ -3,7 +3,7 @@
     "http": {
       "commandName": "Project",
       "launchBrowser": true,
-      "launchUrl": "swagger",
+      "launchUrl": "docs",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       },
@@ -13,7 +13,7 @@
     "https": {
       "commandName": "Project",
       "launchBrowser": true,
-      "launchUrl": "swagger",
+      "launchUrl": "docs",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       },
@@ -23,7 +23,7 @@
     "IIS Express": {
       "commandName": "IISExpress",
       "launchBrowser": true,
-      "launchUrl": "swagger",
+      "launchUrl": "docs",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       }
@@ -31,7 +31,7 @@
     "Docker": {
       "commandName": "Docker",
       "launchBrowser": true,
-      "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}/swagger",
+      "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}/docs",
       "environmentVariables": {
         "ASPNETCORE_URLS": "http://+:8080",
         "ASPNETCORE_ENVIRONMENT": "Development"