feat: add language Tact (#1103)

More about the language: https://tact-lang.org
Hope everything's nice here :)

README.md

@@ -527,6 +527,7 @@ Svg
 Swift
 Swig
 SystemVerilog
+Tact
 Tcl
 Tex
 Text

languages.json

@@ -1596,6 +1596,12 @@
       "quotes": [["\\\"", "\\\""]],
       "extensions": ["sv", "svh"]
     },
+    "Tact": {
+      "line_comment": ["//"],
+      "multi_line_comments": [["/*", "*/"]],
+      "quotes": [["\\\"", "\\\""]],
+      "extensions": ["tact"]
+    },
     "Tcl": {
       "name": "TCL",
       "line_comment": ["#"],

tests/data/tact.tact

@@ -0,0 +1,20 @@
+// 20 lines 12 code 4 comments 4 blanks
+
+import "@stdlib/deploy"; // comment
+
+/* comment */
+fun global() {
+    let str: String = "\n \r \t \u1234 \xFF";
+
+    // comment
+    while (true) { // comment
+        if /* comment */ (true) { /* comment */ }
+    }
+}
+
+// "quoted"
+struct St { /* " */
+    field1: Int; // /*
+    field2: Int as uint128;
+    field3: Int; // */
+}