parser: add raw context

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
parser: introduce KuSymbol

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
parser: context: register types

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
add FIXME

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>