Update todo.md

Author: strawmelonjuice

todo.md

@@ -5,6 +5,7 @@
     - [x] Re-do plugin loader, make it more like Cynthia v1 (using TypeScript imports)
     - [ ] Implement new plugin runtimes
         - [x] JavaScript/TypeScript
+        - [ ] Gleam (JS target)
         - [ ] Python **--> For a future release**
         - [ ] Compiled languages: Gleam, Go, Rust, etc. (through codegen) **--> For a future release**
           - [ ] Implement codegen