rename packages, refactor out tailwind compiler,

go/wasmdevserver/devserver_wasm.go

@@ -0,0 +1,11 @@
+//go:build js && wasm
+
+// This file exists only so the package is not EMPTY under js/wasm.
+//
+// wasmdevserver is a server: it compiles Go, serves HTTP, and walks the filesystem —
+// none of which a browser can do. The real file is excluded from the wasm build (it
+// depends on rsc.Handler, which is itself server-only). But a package whose files are
+// all excluded is a build error, not an empty package, and `GOOS=js go build ./...`
+// would fail on it — which is exactly the command you run to check the half of kjol
+// that DOES target wasm. So the package stays present here, and empty.
+package wasmdevserver