chore: Add option to make warnings non-fatal locally.

build.sbt

@@ -10,6 +10,7 @@ import scala.language.postfixOps
 import scala.sys.process.*
 
 import org.knora.Dependencies
+import org.knora.LocalSettings
 
 //////////////////////////////////////
 // GLOBAL SETTINGS
@@ -194,6 +195,7 @@ lazy val webapi: Project = Project(id = "webapi", base = file("webapi"))
     logLevel := Level.Info,
     javaAgents += Dependencies.aspectjweaver
   )
+  .settings(LocalSettings.localScalacOptions: _*)
   .settings(
     // prepare for publishing
 
@@ -283,6 +285,7 @@ lazy val integration: Project = Project(id = "integration", base = file("integra
     Test / testOptions += Tests.Argument("-oDF"), // show full stack traces and test case durations
     libraryDependencies ++= Dependencies.webapiDependencies ++ Dependencies.webapiTestDependencies ++ Dependencies.integrationTestDependencies
   )
+  .settings(LocalSettings.localScalacOptions: _*)
   .enablePlugins(SbtTwirl, JavaAppPackaging, DockerPlugin, JavaAgent, BuildInfoPlugin, HeaderPlugin)
   .settings(
     name := "integration",

project/LocalSettings.scala

@@ -0,0 +1,13 @@
+package org.knora
+
+import sbt.*
+import Keys.*
+
+// Uncomment L11 and skip-worktree on this file to make warnings non-fatal locally:
+// git update-index --skip-worktree project/LocalSettings.scala
+
+object LocalSettings {
+  val localScalacOptions: Seq[SettingsDefinition] = Seq(
+    // scalacOptions -= "-Xfatal-warnings"
+  )
+}