[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/wasm/global.go

@@ -0,0 +1,55 @@
+package wasm
+
+import (
+	"github.com/tetratelabs/wazero/api"
+	"github.com/tetratelabs/wazero/internal/internalapi"
+)
+
+// constantGlobal wraps GlobalInstance to implement api.Global.
+type constantGlobal struct {
+	internalapi.WazeroOnlyType
+	g *GlobalInstance
+}
+
+// Type implements api.Global.
+func (g constantGlobal) Type() api.ValueType {
+	return g.g.Type.ValType
+}
+
+// Get implements api.Global.
+func (g constantGlobal) Get() uint64 {
+	ret, _ := g.g.Value()
+	return ret
+}
+
+// String implements api.Global.
+func (g constantGlobal) String() string {
+	return g.g.String()
+}
+
+// mutableGlobal extends constantGlobal to allow updates.
+type mutableGlobal struct {
+	internalapi.WazeroOnlyType
+	g *GlobalInstance
+}
+
+// Type implements api.Global.
+func (g mutableGlobal) Type() api.ValueType {
+	return g.g.Type.ValType
+}
+
+// Get implements api.Global.
+func (g mutableGlobal) Get() uint64 {
+	ret, _ := g.g.Value()
+	return ret
+}
+
+// String implements api.Global.
+func (g mutableGlobal) String() string {
+	return g.g.String()
+}
+
+// Set implements the same method as documented on api.MutableGlobal.
+func (g mutableGlobal) Set(v uint64) {
+	g.g.SetValue(v, 0)
+}