feat(treesitter): add injections of glsl

after/queries/lua/injections.scm

@@ -0,0 +1,19 @@
+;; extends
+
+;; inject glsl for any string that starts `#pragma language glsl`
+(string 
+  content: _ @injection.content
+  (#lua-match? @injection.content "^%s*#pragma language glsl")
+  (#set! injection.language "glsl"))
+
+
+; inject glsl for calls to newShader
+; love.graphics.newShader([[...]])
+; and even just newShader([[...]])
+((function_call
+  name: (_) @_function
+  arguments: (arguments
+    (string
+      content: _ @injection.content)))
+  (#contains? @_function "newShader")
+  (#set! injection.language "glsl"))