Added GLSL/HLSL extensions

Added the officially recognized file extensions for GLSL (OpenGL) and HLSL (DirectX) shader languages.

GLSL: comp, frag, geom, glsl, tesc, tese, vert
https://www.khronos.org/opengles/sdk/tools/Reference-Compiler/

HLSL: cso, hlsl
https://docs.microsoft.com/en-us/windows/desktop/direct3dhlsl/dx-graphics-hlsl-part1#using-shader-code-file-extensions

src/inject.js

@@ -168,21 +168,21 @@ const insertLocForDir = () => {
      */
     const acceptableExtensions = ['as', 'asm', 'asp', 'aspx',
         'bash', 'bat',
-        'c', 'cbl', 'cc', 'cfc', 'clj', 'cs', 'css', 'cpp',
+        'c', 'cbl', 'cc', 'cfc', 'clj', 'cs', 'css', 'cpp', 'comp', 'cso',
         'dart', 'd', 'do', 'dpr',
         'el', 'ejs',
-        'f90',
-        'gitignore',
-        'h', 'hs', 'hpp', 'html', 'haml',
+        'f90', 'frag',
+        'gitignore', 'geom', 'glsl',
+        'h', 'hs', 'hpp', 'html', 'haml', 'hlsl',
         'java', 'js', 'json', 'jsp', 'jade', 'jsx',
         'lisp', 'lua', 'less',
         'm', 'md', 'mk', 'mm',
         'pas', 'php', 'pl', 'prl', 'pxd', 'py', 'pyx',
         'r', 'rb',
         's', 'ss', 'scala', 'ser', 'sh', 'sql', 'swift', 'svg', 'sass', 'scss',
         'ts',
-        'tmpl', 'tpl', 'tsx',
-        'vb',
+        'tmpl', 'tpl', 'tsx', 'tese', 'tesc',
+        'vb', 'vert',
         'win',
         'xml',
         'yaml', 'yml'];