xsbti.Position: Also add {start,end}{Line,Column}

Positions in the Language Server Protocol and Build Server Protocol are
line/column-based instead of offset-based, so this is more convenient.
Computing the line/column from the offset is possible but requires
reading the source file.

Author: smarter

internal/util-interface/src/main/java/xsbti/Position.java

@@ -22,4 +22,8 @@ public interface Position
 	// Default values to avoid breaking binary compatibility
 	default Optional<Integer> startOffset() { return Optional.empty(); }
 	default Optional<Integer> endOffset() { return Optional.empty(); }
+	default Optional<Integer> startLine() { return Optional.empty(); }
+	default Optional<Integer> startColumn() { return Optional.empty(); }
+	default Optional<Integer> endLine() { return Optional.empty(); }
+	default Optional<Integer> endColumn() { return Optional.empty(); }
 }

internal/util-logging/src/main/scala/sbt/util/InterfaceUtil.scala

@@ -46,7 +46,7 @@ object InterfaceUtil {
       sourcePath0: Option[String],
       sourceFile0: Option[File]
   ): Position =
-    position(line0, content, offset0, pointer0, pointerSpace0, sourcePath0, sourceFile0, None, None)
+    position(line0, content, offset0, pointer0, pointerSpace0, sourcePath0, sourceFile0, None, None, None, None, None, None)
 
   def position(
       line0: Option[Integer],
@@ -57,7 +57,11 @@ object InterfaceUtil {
       sourcePath0: Option[String],
       sourceFile0: Option[File],
       startOffset0: Option[Integer],
-      endOffset0: Option[Integer]
+      endOffset0: Option[Integer],
+      startLine0: Option[Integer],
+      startColumn0: Option[Integer],
+      endLine0: Option[Integer],
+      endColumn0: Option[Integer]
   ): Position =
     new ConcretePosition(line0,
                          content,
@@ -67,7 +71,11 @@ object InterfaceUtil {
                          sourcePath0,
                          sourceFile0,
                          startOffset0,
-                         endOffset0)
+                         endOffset0,
+                         startLine0,
+                         startColumn0,
+                         endLine0,
+                         endColumn0)
 
   def problem(cat: String, pos: Position, msg: String, sev: Severity): Problem =
     new ConcreteProblem(cat, pos, msg, sev)
@@ -99,7 +107,11 @@ object InterfaceUtil {
       sourcePath0: Option[String],
       sourceFile0: Option[File],
       startOffset0: Option[Integer],
-      endOffset0: Option[Integer]
+      endOffset0: Option[Integer],
+      startLine0: Option[Integer],
+      startColumn0: Option[Integer],
+      endLine0: Option[Integer],
+      endColumn0: Option[Integer]
   ) extends Position {
     val line = o2jo(line0)
     val lineContent = content
@@ -110,6 +122,10 @@ object InterfaceUtil {
     val sourceFile = o2jo(sourceFile0)
     override val startOffset = o2jo(startOffset0)
     override val endOffset = o2jo(endOffset0)
+    override val startLine = o2jo(startLine0)
+    override val startColumn = o2jo(startColumn0)
+    override val endLine = o2jo(endLine0)
+    override val endColumn = o2jo(endColumn0)
   }
 
   private final class ConcreteProblem(