[orx-camera] Re-add Camera2D (#275)

orx-camera/build.gradle.kts

@@ -1,8 +1,26 @@
+import ScreenshotsHelper.collectScreenshots
+
 plugins {
     org.openrndr.extra.convention.`kotlin-multiplatform`
 }
 
 kotlin {
+    jvm {
+        @Suppress("UNUSED_VARIABLE")
+        val demo by compilations.getting {
+            // TODO: Move demos to /jvmDemo
+            defaultSourceSet {
+                kotlin.srcDir("src/demo/kotlin")
+            }
+            collectScreenshots { }
+        }
+        testRuns["test"].executionTask {
+            useJUnitPlatform {
+                includeEngines("spek2")
+            }
+        }
+    }
+
     sourceSets {
         @Suppress("UNUSED_VARIABLE")
         val commonMain by getting {
@@ -15,5 +33,12 @@ kotlin {
                 implementation(libs.kotlin.reflect)
             }
         }
+
+        @Suppress("UNUSED_VARIABLE")
+        val jvmDemo by getting {
+            dependencies {
+                implementation(project(":orx-camera"))
+            }
+        }
     }
-}
+}