[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/sys/stat_bsd.go

@@ -0,0 +1,29 @@
+//go:build (amd64 || arm64) && (darwin || freebsd)
+
+package sys
+
+import (
+	"io/fs"
+	"syscall"
+)
+
+const sysParseable = true
+
+func statFromFileInfo(info fs.FileInfo) Stat_t {
+	if d, ok := info.Sys().(*syscall.Stat_t); ok {
+		st := Stat_t{}
+		st.Dev = uint64(d.Dev)
+		st.Ino = d.Ino
+		st.Mode = info.Mode()
+		st.Nlink = uint64(d.Nlink)
+		st.Size = d.Size
+		atime := d.Atimespec
+		st.Atim = atime.Sec*1e9 + atime.Nsec
+		mtime := d.Mtimespec
+		st.Mtim = mtime.Sec*1e9 + mtime.Nsec
+		ctime := d.Ctimespec
+		st.Ctim = ctime.Sec*1e9 + ctime.Nsec
+		return st
+	}
+	return defaultStatFromFileInfo(info)
+}