feat: rename project from DocuNova to DocuElevate, update related documentation and templates

.env.demo

@@ -2,7 +2,7 @@
 WORKDIR=/workdir
 DATABASE_URL=sqlite:///./app/database.db
 REDIS_URL=redis://redis:6379/0
-EXTERNAL_HOSTNAME=docunova.example.com
+EXTERNAL_HOSTNAME=docuelevate.example.com
 GOTENBERG_URL=http://gotenberg:3000
 ALLOW_FILE_DELETE=true  # Allow deletion of file records
 
@@ -15,7 +15,7 @@ ADMIN_PASSWORD=your_secure_password
 # **OpenID Connect/Authentik Settings**
 AUTHENTIK_CLIENT_ID=<yourAuthentikAppClientID>
 AUTHENTIK_CLIENT_SECRET=<yourAuthentikAppClientSecret>
-AUTHENTIK_CONFIG_URL=<ConfigUrlOfYourApp, e.g. https://authentik.example.com/application/o/docunova/.well-known/openid-configuration>
+AUTHENTIK_CONFIG_URL=<ConfigUrlOfYourApp, e.g. https://authentik.example.com/application/o/docuelevate/.well-known/openid-configuration>
 
 # **AI/ML Services**
 # OpenAI
@@ -31,10 +31,10 @@ AZURE_AI_KEY=<AZURE_AI_KEY>
 # **Email Settings**
 EMAIL_HOST=smtp.example.com
 EMAIL_PORT=587
-EMAIL_USERNAME=docunova@example.com
+EMAIL_USERNAME=docuelevate@example.com
 EMAIL_PASSWORD=your_secure_email_password
 EMAIL_USE_TLS=True
-EMAIL_SENDER=DocuNova System <docunova@example.com>
+EMAIL_SENDER=DocuElevate System <docuelevate@example.com>
 EMAIL_DEFAULT_RECIPIENT=recipient@example.com
 
 # **IMAP Settings**