Add Symfony RPC Bundle

Signed-off-by: Gawain Lynch <gawain.lynch@gmail.com>
Base init

Signed-off-by: Gawain Lynch <gawain.lynch@gmail.com>
Empty asset files

Signed-off-by: Gawain Lynch <gawain.lynch@gmail.com>
Basic extension outline

Signed-off-by: Gawain Lynch <gawain.lynch@gmail.com>
Start of a controller

Signed-off-by: Gawain Lynch <gawain.lynch@gmail.com>