[JS, Wasm] Add to gradle.properties some properties useful while working with JS & Wasm

gradle.properties

@@ -108,3 +108,26 @@ org.gradle.vfs.watch=true
 #kotlin.fir.modularized.testdata.intellij=/path/to/intellij/project/testdata
 #kotlin.fir.modularized.testdata.youtrack=/path/to/youtrack/project/testdata
 #kotlin.fir.modularized.testdata.space=/path/to/space/project/testdata
+
+# =====================
+# JS & Wasm Tests
+# Any property whose name starts with "fd." will be forwarded to unit test process without "fd." prefix and the same value,
+# including properties from root local.properties.
+
+# The property to control IR dump strategy.
+# For `KotlinLike` it uses `e.dumpKotlinLike()` which is more readable & concise but may omit some information,
+# otherwise "classic" `e.dump()` which is more verbose.
+#fd.org.jetbrains.kotlin.compiler.ir.dump.strategy=KotlinLike
+
+# Customize wasm unit test runner, possible values:
+# * none | false | 0 (default)
+#   - Do nothing special.
+# * debug | true | 1
+#   - Prints paths to current test's kt file and other generated files.
+#   - Generates .wat file.
+#   - Generate html file to run a test inside browser.
+#   - Generate verbose js for running a test (log "test passed").
+# * super_debug | 2
+#   - All from previous.
+#   - Dump IR after each phase.
+#fd.kotlin.wasm.debugMode=debug