Add validation for new file names for sql projects (#21601)

* Add validation for new file names for sql projects

* Addres comments and add validation for new project dialog

* Address comments

* Address comments on test

* Fix tests

* Remove extra error messages and rename file

* Address comments

* Fix tests

* Add test file back

extensions/sql-database-projects/src/common/utils.ts

@@ -731,3 +731,35 @@ export async function getTargetPlatformFromServerVersion(serverInfo: azdataType.
 
 	return targetPlatform;
 }
+
+/**
+ * Determines if a given character is a valid filename character
+ * @param c Character to validate
+ */
+export function isValidFilenameCharacter(c: string): boolean {
+	return getDataWorkspaceExtensionApi().isValidFilenameCharacter(c);
+}
+
+/**
+ * Replaces invalid filename characters in a string with underscores
+ * @param s The string to be sanitized for a filename
+ */
+export function sanitizeStringForFilename(s: string): string {
+	return getDataWorkspaceExtensionApi().sanitizeStringForFilename(s);
+}
+
+/**
+ * Returns true if the string is a valid filename
+ * @param name filename to check
+ */
+export function isValidBasename(name?: string): boolean {
+	return getDataWorkspaceExtensionApi().isValidBasename(name);
+}
+
+/**
+ * Returns specific error message if file name is invalid
+ * @param name filename to check
+ */
+export function isValidBasenameErrorMessage(name?: string): string {
+	return getDataWorkspaceExtensionApi().isValidBasenameErrorMessage(name);
+}