[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/ncruces/go-sqlite3/driver/time.go

@@ -0,0 +1,31 @@
+package driver
+
+import (
+	"time"
+)
+
+// Convert a string in [time.RFC3339Nano] format into a [time.Time]
+// if it roundtrips back to the same string.
+// This way times can be persisted to, and recovered from, the database,
+// but if a string is needed, [database/sql] will recover the same string.
+func maybeTime(text string) (_ time.Time, _ bool) {
+	// Weed out (some) values that can't possibly be
+	// [time.RFC3339Nano] timestamps.
+	if len(text) < len("2006-01-02T15:04:05Z") {
+		return
+	}
+	if len(text) > len(time.RFC3339Nano) {
+		return
+	}
+	if text[4] != '-' || text[10] != 'T' || text[16] != ':' {
+		return
+	}
+
+	// Slow path.
+	var buf [len(time.RFC3339Nano)]byte
+	date, err := time.Parse(time.RFC3339Nano, text)
+	if err == nil && text == string(date.AppendFormat(buf[:0], time.RFC3339Nano)) {
+		return date, true
+	}
+	return
+}