Feat: code format

Author: AChangFeng

.gitignore

@@ -1 +1,3 @@
 *.vsix
+node_modules
+.vscode

README.md

@@ -2,10 +2,21 @@
 
 This extension provides Flink SQL support for VSCode. It also provides some basic code snippets for operations such as creating a table, altering a table, or renaming columns.
 
+## Build
+
+### Prerequisites
+
+- npm
+- vsce
+
+### Build
+
+- Run ```npm install --dependencies``` to install dependencies.
+- Run ```vsce package``` to build extension.
 
 ## Features
 
-Enables syntax highlighting and complete keywords for Flink SQL(v1.16.0), including user-defined functions.
+Enables syntax highlighting, complete keywords, and code format for Flink SQL(v1.16.0), including user-defined functions.
 
 ![](images/flink-sql-vscode-snippets.gif)
 
@@ -21,6 +32,9 @@ Enable the extension on your file, either name the file with a extension:
 
 Or press F1, type 'Change Language Mode', and then choose FlinkSQL.
 
+### Format
+
+Select your FlinkSQL code and press ```Alt+Shift+f```.
 
 ## Color theme recommend
 ~~~json

package-lock.json

@@ -23,16 +23,16 @@
     },
     "homepage": "https://github.com/camilesing/flink-sql-vscode/master/README.md",
     "categories": [
-        "Programming Languages"
+        "Programming Languages", "Formatters"
     ],
     "keywords": [
-        "Flink SQL", "Flink"
+        "Flink SQL", "Flink", "Formatter"
     ],
     "preview": false,
     "contributes": {
         "languages": [{
             "id": "flink-sql",
-            "aliases": ["FlinkSQL", "flink-sql", "Flink SQL"],
+            "aliases": ["FlinkSQL", "flink-sql", "Flink SQL","fql"],
             "extensions": [".sql", ".fql"],
             "configuration": "./language-configuration.json"
         }],
@@ -47,5 +47,13 @@
                 "path": "./snippets/flink-sql.json"
             }
         ]
+    },
+    "activationEvents": [
+        "onLanguage:sql",
+        "onLanguage:flink-sql"
+      ],
+    "main": "./src/extension.js",
+    "dependencies": {
+        "sql-formatter-plus": "^1.3.6"
     }
 }