Support godot shader (#1118)

* Support godot shader

* Update README

Author: limuy2022

README.md

@@ -404,6 +404,7 @@ FSharp
 Fstar
 GDB
 GdScript
+GdShader
 Gherkin
 Gleam
 Glsl

languages.json

@@ -1811,6 +1811,12 @@
       "line_comment": ["#"],
       "quotes": [["\\\"", "\\\""], ["'", "'"]],
       "extensions": ["zsh"]
+    },
+    "GdShader": {
+      "name": "GDShader",
+      "line_comment": ["//"],
+      "multi_line_comments": [["/*", "*/"]],
+      "extensions": ["gdshader"]
     }
   }
 }

tests/data/gdshader.gdshader

@@ -0,0 +1,24 @@
+// 24 lines 6 code 13 comments 5 blanks
+/* 
+test
+test
+test
+*/ 
+
+/* /** */
+
+void fragment() {
+    // there is not any string in gdshader
+    int x, b, c;
+    float p, q, r;
+    if(b == c) {
+
+    }
+    /**
+    //sdsadasdasdasd /*
+    **/
+
+    /* // odpwopdw
+    // */
+}
+