Add back scripting languages commonly used

Restore python (with pylsp) and JS, remove gfortran from default
installed programming languages. Figured I would want scripting
languages on the fly but compiled languages will be focussed on a
project, so no issue having a nix-shell env.

home/prog/default.nix

@@ -12,18 +12,23 @@
     # Shell
     shfmt
     shellcheck
+    nodePackages.prettier
 
     # Lua
-    (luajit.withPackages (ps: [(ps.callPackage ./luarocks/scilua.nix {})]))
+    (luajit.withPackages
+      (ps: [(ps.callPackage ./luarocks/scilua.nix {})]))
     luarocks-nix
     lua-language-server
     stylua
 
     # Python
+    (python3.withPackages
+      (ps: with ps; [python-lsp-server mypy isort]))
     ruff
 
-    # Fortran
-    gfortran
-    fortls
+    # JavaScript / TypeScript
+    nodejs
+    nodePackages.typescript-language-server
+    nodePackages.eslint
   ];
 }