Add support for text block newline formatter settings (#2936)

* Add option for new formatter in ui
* Add sample text block to preview for newlines

---------

Co-authored-by: Jeff Johnston <jjohnstn@redhat.com>

Author: inuyasha82

org.eclipse.jdt.ui/preview/formatter.java

@@ -666,6 +666,8 @@ public class Empty {}
  {
 @SuppressWarnings("unused") final @Positive int k;
 }
+  String s = "123" + """
+  		abcdef""" + "789";
   void foo() {    ;;   }
   void empty(@SuppressWarnings("unused") final int i) { }}
 enum MyEnum {    @Deprecated UNDEFINED(0) { }}

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/formatter/FormatterMessages.java

@@ -233,6 +233,7 @@ private FormatterMessages() {
 	public static String FormatterModifyDialog_newLines_pref_before_finally_statements;
 	public static String FormatterModifyDialog_newLines_pref_before_while_in_do_statements;
 	public static String FormatterModifyDialog_newLines_pref_empty_statement;
+	public static String FormatterModifyDialog_newLines_pref_textblock_statement;
 	public static String FormatterModifyDialog_newLines_pref_end_of_file;
 	public static String FormatterModifyDialog_newLines_pref_enum_constants;
 	public static String FormatterModifyDialog_newLines_pref_fields;

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/formatter/FormatterMessages.properties

@@ -460,6 +460,7 @@ FormatterModifyDialog_newLines_pref_keep_type_declaration_on_one_line=Class decl
 FormatterModifyDialog_newLines_pref_end_of_file=At end of file
 FormatterModifyDialog_newLines_pref_after_labels=After labels
 FormatterModifyDialog_newLines_pref_empty_statement=Before empty statement
+FormatterModifyDialog_newLines_pref_textblock_statement=After and before opening and closing quotes of text block
 
 FormatterModifyDialog_newLines_pref_after_opening_brace_of_array_initializer=After opening brace of array initializer
 FormatterModifyDialog_newLines_pref_before_closing_brace_of_array_initializer=Before closing brace of array initializer

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/formatter/FormatterModifyDialog.java

@@ -1336,6 +1336,7 @@ private void createNewLinesTree() {
 		Consumer<Section> modAll= s -> CheckboxPreference.addModifyAll(s, fImages);
 		fTree.builder(FormatterMessages.FormatterModifyDialog_newLines_tree_new_lines, "section-newlines") //$NON-NLS-1$
 				.pref(FormatterMessages.FormatterModifyDialog_newLines_pref_empty_statement, DefaultCodeFormatterConstants.FORMATTER_PUT_EMPTY_STATEMENT_ON_NEW_LINE)
+				.pref(FormatterMessages.FormatterModifyDialog_newLines_pref_textblock_statement, DefaultCodeFormatterConstants.FORMATTER_PUT_TEXT_BLOCK_QUOTES_ON_NEW_LINE)
 				.gap()
 				.pref(FormatterMessages.FormatterModifyDialog_newLines_pref_after_opening_brace_of_array_initializer,
 						DefaultCodeFormatterConstants.FORMATTER_INSERT_NEW_LINE_AFTER_OPENING_BRACE_IN_ARRAY_INITIALIZER)
@@ -1374,7 +1375,7 @@ private void createNewLinesTree() {
 				.build(null, (parent, label, key) -> {
 					String[] values= CheckboxPreference.DO_NOT_INSERT_INSERT;
 					if (parent.getKey().endsWith("-ifelse") || parent.getKey().endsWith("-simpleloops") //$NON-NLS-1$ //$NON-NLS-2$
-							|| DefaultCodeFormatterConstants.FORMATTER_PUT_EMPTY_STATEMENT_ON_NEW_LINE.equals(key)) {
+							|| DefaultCodeFormatterConstants.FORMATTER_PUT_EMPTY_STATEMENT_ON_NEW_LINE.equals(key) || DefaultCodeFormatterConstants.FORMATTER_PUT_TEXT_BLOCK_QUOTES_ON_NEW_LINE.equals(key) ) {
 						values= CheckboxPreference.FALSE_TRUE;
 					}
 					return fTree.addCheckbox(parent, label, key, values);