build: update plugin version to 2.0.0

- Remove '-rc.9' suffix from pluginVersion in gradle.properties
- Set pluginVersion to 2.0.0 for final release

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 = 2.0.0-rc.9
+pluginVersion = 2.0.0
 
 # Supported IDEs: idea, pycharm
 baseIDE=idea