Add option to enable or disable markdown formatting

This commit provides ui to enable or disbale markdown formatting

partial fix :
eclipse-jdt/eclipse.jdt.core#4335

Author: SougandhS

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

@@ -530,6 +530,7 @@ private FormatterMessages() {
 	public static String ModifyDialogTabPage_error_msg_values_items_text_unassigned;
 	public static String ModifyDialogTabPage_NumberPreference_error_invalid_key;
 	public static String ModifyDialogTabPage_NumberPreference_error_invalid_value;
+	public static String FormatterModifyDialog_comments_pref_enable_markdown;
 
 	static {
 		NLS.initializeMessages(BUNDLE_NAME, FormatterMessages.class);

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

@@ -348,6 +348,7 @@ FormatterModifyDialog_comments_pref_format_header=Enable header comment formatti
 FormatterModifyDialog_comments_pref_format_html=Format HTML tags
 FormatterModifyDialog_comments_pref_format_code_snippets=Format Java code snippets inside 'pre' tags
 FormatterModifyDialog_comments_pref_format_line_comments_on_first_column=Format line comments on first column
+FormatterModifyDialog_comments_pref_enable_markdown=Enable Markdown comment formatting
 
 FormatterModifyDialog_comments_pref_remove_blank_lines=Remove blank lines
 FormatterModifyDialog_comments_pref_blank_line_before_javadoc_tags=Blank line before Javadoc tags

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

@@ -1578,6 +1578,7 @@ private void createCommentsTree() {
 				.gap()
 				.pref(FormatterMessages.FormatterModifyDialog_comments_pref_enable_javadoc, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_JAVADOC_COMMENT)
 				.pref(FormatterMessages.FormatterModifyDialog_comments_pref_enable_block, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_BLOCK_COMMENT)
+				.pref(FormatterMessages.FormatterModifyDialog_comments_pref_enable_markdown, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_BLOCK_COMMENT)
 				.pref(FormatterMessages.FormatterModifyDialog_comments_pref_enable_line, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_LINE_COMMENT, pref -> {
 					CheckboxPreference child= fTree.addCheckbox(pref, FormatterMessages.FormatterModifyDialog_comments_pref_format_line_comments_on_first_column,
 							DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_LINE_COMMENT_STARTING_ON_FIRST_COLUMN, CheckboxPreference.FALSE_TRUE);

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/JavaFormattingContext.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2017 IBM Corporation and others.
+ * Copyright (c) 2000, 2024 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -49,7 +49,8 @@ public String[] getPreferenceKeys() {
 			    DefaultCodeFormatterConstants.FORMATTER_COMMENT_LINE_LENGTH,
 			    DefaultCodeFormatterConstants.FORMATTER_COMMENT_CLEAR_BLANK_LINES_IN_BLOCK_COMMENT,
 			    DefaultCodeFormatterConstants.FORMATTER_COMMENT_CLEAR_BLANK_LINES_IN_JAVADOC_COMMENT,
-			    DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_HTML };	}
+			    DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_HTML,
+			    DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_MARKDOWN_COMMENT};}
 
 
 	/*