VSC Code snippets (templates) (#16673)

* some snippets + changelog

* typo fix

* added for loops, fixed parenthesis for addtimer

.vscode/dm_flags.code-snippets

@@ -0,0 +1,29 @@
+{
+	// Place your Aurora.3 workspace snippets here. Each snippet is defined under a snippet name and has a scope, prefix, body and
+	// description. Add comma separated ids of the languages where the snippet is applicable in the scope field. If scope
+	// is left empty or omitted, the snippet gets applied to all languages. The prefix is what is
+	// used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
+	// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders.
+	// Placeholders with the same ids are connected.
+	// Example:
+	// "Print to console": {
+	// 	"scope": "javascript,typescript",
+	// 	"prefix": "log",
+	// 	"body": [
+	// 		"console.log('$1');",
+	// 		"$2"
+	// 	],
+	// 	"description": "Log output to console"
+	// }
+  //
+  // Refer to https://code.visualstudio.com/docs/editor/userdefinedsnippets
+
+  "CHECK_FLAG": {
+    "prefix": ["CHECK_FLAG", "HAS_FLAG", "NOT_FLAG"],
+    "body": ["${1|HAS_FLAG,NOT_FLAG|}(${2:variable}, ${3:flag})"]
+  },
+  "SET_FLAG": {
+    "prefix": ["SET_FLAG", "BITFLAG"],
+    "body": ["${1:variable} = BITFLAG(${2:flag_position})"]
+  },
+}