Release 2.3.3 (#839)

* chore: bump version to v2.3.3-preview

* Optimiziation for multiple parallel and long-running downloads (#838)

* Add missing Content-Type header to downloads (#837)

Conditionally add Content-Length header to downloads
Only calculate fileSize if file is not a directory in DirectDownloadPlugin

* Update dependencies, add Google Guava

* Refactor and optimize download bandwidth monitoring and throttling

* Update .jar layer extraction command in Dockerfile

* Fix Dockerfile.ubuntu

* Furhter performance and tracking improvements for downloads

* Fix tests

* Update HeroUI version

* Encode filenames in Content-Disposition header according to RFC 6266 (#841)

* Encode filenames in Content-Disposition header with UTF-8 according to RFC 6266

* Fix tests

gradle.properties

@@ -3,14 +3,15 @@ org.gradle.jvmargs=-Xmx2g -XX:MaxMetaspaceSize=512m
 org.gradle.parallel=true
 org.gradle.caching=true
 org.gradle.configuration-cache=true
-# Plugin versions
+# Dependency versions
 kotlinVersion=2.2.20
 kspVersion=2.2.20-2.0.3
 vaadinVersion=24.9.4
 springBootVersion=3.5.6
 springCloudVersion=2025.0.0
 springDependencyManagementVersion=1.1.7
-# Dependency versions
+guavaVersion=33.5.0-jre
+# Plugin dependency versions
 pf4jVersion=3.13.0
 pf4jKspVersion=2.2.20-1.0.3
 # Test framework versions