Feature variants (#376)

Migrate from buildSrc to build-logic. Setup feature variants.

build-logic/settings.gradle.kts

@@ -0,0 +1,27 @@
+include("orx-convention", "orx-variant-plugin")
+
+dependencyResolutionManagement {
+    repositories {
+        mavenCentral()
+        mavenLocal {
+            include("org.openrndr")
+        }
+    }
+
+    versionCatalogs {
+        create("libs") {
+            from(files("../gradle/libs.versions.toml"))
+        }
+
+        // We use a regex to get the openrndr version from the primary catalog as there is no public Gradle API to parse catalogs.
+        val regEx = Regex("^openrndr[ ]*=[ ]*(?:\\{[ ]*require[ ]*=[ ]*)?\"(.*)\"[ ]*(?:\\})?", RegexOption.MULTILINE)
+        val openrndrVersion = regEx.find(File(rootDir,"../gradle/libs.versions.toml").readText())?.groupValues?.get(1) ?: error("can't find openrndr version")
+        create("sharedLibs") {
+            from("org.openrndr:openrndr-dependency-catalog:$openrndrVersion")
+        }
+        create("openrndr") {
+            from("org.openrndr:openrndr-module-catalog:$openrndrVersion")
+        }
+    }
+}
+