internal/system: relocate from system

These packages are highly specific to hakurei and are difficult to use safely from other pieces of code.

Their exported symbols are made available until v0.4.0 where they will be removed for #24.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/system/dbus/export_test.go

@@ -0,0 +1,15 @@
+package dbus
+
+import (
+	"context"
+	"io"
+
+	"hakurei.app/message"
+)
+
+// NewDirect returns a new instance of [Proxy] with its sandbox disabled.
+func NewDirect(ctx context.Context, msg message.Msg, final *Final, output io.Writer) *Proxy {
+	p := New(ctx, msg, final, output)
+	p.useSandbox = false
+	return p
+}