chore: drop the v1 Go sources, module, and committed binary

v2 is pure TypeScript (tsc → dist/); the 83 Go files, go.mod, the
GoReleaser config, and a 15.8 MB compiled binary at the repo root were
dead — never built, shipped, or imported — and only confused the layout
and bloated clones. The v1 Go is preserved at tag v0.9.0, so this loses
nothing and is fully reversible.

Author: halfaipg

.gitignore

@@ -23,3 +23,6 @@ node_modules/
 # OS
 .DS_Store
 Thumbs.db
+
+# stray compiled binary (v1 Go artifact name)
+/cli