gradle: add properties and modify injected-client (#1145)

* add implementation for getItemCount

* Ignore build directory in project root

* save injector results as class files

* package injected-client for shading into client

* auto-updating properties

* fix run task

* shade injected-client into jar

cache/build.gradle

@@ -22,11 +22,6 @@ dependencies {
     annotationProcessor group: 'org.projectlombok', name: 'lombok', version: '1.18.8'
 }
 
-ext {
-    rsversion = 181
-    cacheversion = 165
-}
-
 test {
     exclude '**/TitleDumper*'
 }