[experiment] add alternative wasm sqlite3 implementation available via build-tag (#2863)

This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).

vendor/github.com/tetratelabs/wazero/internal/engine/wazevo/memmove.go

@@ -0,0 +1,11 @@
+package wazevo
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+//go:linkname memmove runtime.memmove
+func memmove(_, _ unsafe.Pointer, _ uintptr)
+
+var memmovPtr = reflect.ValueOf(memmove).Pointer()