As discussed in this PR the current symbol lookup could be improved so we don't have to write: pwndbg.dbg.selected_inferior().symbol_address_from_name("je_arena_emap_global")

Similar to other helper functions in aglib for fetching pointer values and such, it should probably expose it's own symbol_address_from_name() that calls pwndbg.dbg.selected_inferior().

@mbrla0 @disconnect3d