chore: update AutoDev plugin version to 1.6.4-SNAPSHOT

The AutoDev plugin version in gradle.properties has been updated to 1.6.4-SNAPSHOT to indicate that it is a snapshot version for development purposes.

Author: phodal

gradle.properties

@@ -7,7 +7,7 @@ pluginGroup = com.phodal.autodev
 pluginName = AutoDev
 pluginRepositoryUrl = https://github.com/unit-mesh/auto-dev
 # SemVer format -> https://semver.org
-pluginVersion = 1.6.3
+pluginVersion = 1.6.4-SNAPSHOT
 
 # Supported IDEs: idea, pycharm
 baseIDE=idea