Add metals and bloop to gitignore (#2898)

* Modify `build.sbt` to dynamically fetch the IO version from environment variables with a fallback to version 1.10.3, rather than using the sbt version value.
* add vscode bloop and metals files

---------

Co-authored-by: Tibor Casteleijn <[email protected]>

Author: tiborrr

.gitignore

@@ -34,3 +34,5 @@ sbt.json
 /yarn.lock
 .metals
 .vscode
+.bloop
+metals.sbt

project/build.sbt

@@ -1,7 +1,11 @@
+// Get io version from environment or fall back to a known working version
+def ioVersion = sys.env
+  .get("BUILD_VERSION")
+  .orElse(sys.props.get("sbt.build.version"))
+  .getOrElse("1.10.3")
+
 libraryDependencies ++= Seq(
   "com.typesafe" % "config" % "1.4.3",
-  // sbt-native-packager and sbt-github-pages pull in an incompatible
-  // version of sbt-io which will break the build as soon as the
-  // sbt-bloop plugin is also present
-  "org.scala-sbt" %% "io" % sbtVersion.value
+  // Use the determined version instead of sbtVersion.value
+  "org.scala-sbt" %% "io" % ioVersion
 )