feat: add default snippet documentation

Author: jialan

src/monaco.contribution.ts

@@ -189,7 +189,8 @@ export const defaultCompletionService: CompletionService = function (
 			filterText: item.prefix,
 			insertText: item.insertText,
 			insertTextRules: languages.CompletionItemInsertTextRule.InsertAsSnippet,
-			detail: item.description || 'snippet'
+			detail: item.description || 'snippet',
+			documentation: item.insertText
 		})) || [];
 
 	return Promise.resolve([...keywordsCompletionItems, ...snippetCompletionItems]);

website/src/languages/helpers/completionService.ts

@@ -194,7 +194,8 @@ export const completionService: CompletionService = async function (
 			insertText: item.insertText,
 			insertTextRules: languages.CompletionItemInsertTextRule.InsertAsSnippet,
 			sortText: '1' + item.prefix,
-			detail: item.description !== undefined ? item.description : 'SQL模板'
+			detail: item.description !== undefined ? item.description : 'SQL模板',
+			documentation: item.insertText
 		})) || [];
 
 	return [...syntaxCompletionItems, ...keywordsCompletionItems, ...snippetCompletionItems];