WIP: WASM port - switch to ncruces/go-sqlite3, add WASM stubs

- Switched from modernc.org/sqlite to ncruces/go-sqlite3 for WASM support
- Added WASM-specific stubs for daemon process management
- Created wasm/ directory with build.sh and Node.js runner
- WASM build succeeds (32MB bd.wasm)
- Node.js can load and execute the WASM module
- Next: Need to bridge Go file I/O to Node.js fs module

Related: bd-44d0, bd-8534, bd-c7eb

internal/daemon/kill_wasm.go

@@ -0,0 +1,20 @@
+//go:build js && wasm
+
+package daemon
+
+import "fmt"
+
+// WASM doesn't support process management, so these are stubs
+// Daemon mode is not supported in WASM environments
+
+func killProcess(pid int) error {
+	return fmt.Errorf("daemon operations not supported in WASM")
+}
+
+func forceKillProcess(pid int) error {
+	return fmt.Errorf("daemon operations not supported in WASM")
+}
+
+func isProcessAlive(pid int) bool {
+	return false
+}