Add [email protected]; add rudimentary instructions to README (#19)

What it says on the tin, really. Adding `tree-sitter-gdscript` is
required for me to start work on gdscript support and eventually an
editor plugin for Godot. Feel free to edit the instructions or delay
those until another PR, though.

---------

Co-authored-by: Andreas Arvidsson <[email protected]>

Author: rinOfTheStars

README.md

@@ -1,3 +1,9 @@
 # Cursorless Tree sitter wasms
 
 Repository building wasms for use by Cursorless.
+
+Instructions for adding new parser wasms (WIP):
+
+- Add the tree-sitter package for the specific language to `package.json` directly, or use pnpm to do so. 
+
+- If a build failure of some sort occurs, you will need to utilize the special build options in `build.ts`, specifically in the `processParser` function. If you can't figure it out, leave the PR as a draft and ask for help.  

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cursorless/tree-sitter-wasms",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Prebuilt WASM binaries for tree-sitter's language parsers.",
   "packageManager": "[email protected]",
   "main": "bindings/node",
@@ -35,6 +35,7 @@
     "tree-sitter-css": "0.19.0",
     "tree-sitter-dart": "github:UserNobody14/tree-sitter-dart#9ac03bb2154316624fb4c41fe0f372a5f1597b43",
     "tree-sitter-elixir": "github:elixir-lang/tree-sitter-elixir#02a6f7fd4be28dd94ee4dd2ca19cb777053ea74e",
+    "tree-sitter-gdscript": "5.0.1",
     "tree-sitter-gleam": "github:gleam-lang/tree-sitter-gleam#2012f294baacf30e7a62414754021284377366c6",
     "tree-sitter-go": "github:tree-sitter/tree-sitter-go#bbaa67a180cfe0c943e50c55130918be8efb20bd",
     "tree-sitter-haskell": "github:tree-sitter/tree-sitter-haskell#a50070d5bb5bd5c1281740a6102ecf1f4b0c4f19",