(parse-signal-name type signal-name) => signal
signal-info structures.
Parses the signal name and returns the corresponding information. signal-name may include the detail part.
Example:
(parse-signal-name "GObject" "notify::label")
=>
#<Signal [#1] void GObject.notify::label(GParam) [RUN-FIRST, NO-RECURSE, DETAILED, ACTION, NO-HOOKS]>