feat: update language normalization map

Author: MunifTanjim

lua/copilot/util.lua

@@ -128,10 +128,21 @@ local eol_by_fileformat = {
 }
 
 local language_normalization_map = {
+  bash = "shellscript",
+  bst = "bibtex",
+  cs = "csharp",
+  cuda = "cuda-cpp",
+  dosbatch = "bat",
+  dosini = "ini",
+  gitcommit = "git-commit",
+  gitrebase = "git-rebase",
+  make = "makefile",
+  objc = "objective-c",
+  objcpp = "objective-cpp",
+  ps1 = "powershell",
+  raku = "perl6",
+  sh = "shellscript",
   text = "plaintext",
-  javascriptreact = "javascript",
-  jsx = "javascript",
-  typescriptreact = "typescript",
 }
 
 local function language_for_file_type(filetype)