Create Auth/NTLM Endpoint

- Adds NTLM challenge negotiation
- Checks NTLM auth user & domain against AD / LDAP and returns info
- Adds relevant .env entries

.env.example

@@ -7,6 +7,15 @@ APP_SECRET=REPLACE_WITH_LONG_SECRET
 
 JWT_TOKEN_EXPIRES_IN=30d
 
+# Use NTLM for user authentication
+NTLM_AUTH=false
+
+# LDAP settings for NTLM authentication
+LDAP_BASEDN=
+LDAP_DOMAINSUFFIX=
+LDAP_USERNAME=
+LDAP_PASSWORD=
+
 DATABASE_URL="postgresql://postgres:password@localhost:5432/docmost?schema=public"
 REDIS_URL=redis://127.0.0.1:6379