Add Time::Error (#14743)

Author: Blacksmoke16

src/time.cr

@@ -212,7 +212,11 @@ require "crystal/system/time"
 # elapsed_time # => 20.milliseconds (approximately)
 # ```
 struct Time
-  class FloatingTimeConversionError < Exception
+  # Raised when an error occurs while performing a `Time` based operation.
+  class Error < Exception
+  end
+
+  class FloatingTimeConversionError < Error
   end
 
   include Comparable(Time)

src/time/location.cr

@@ -51,7 +51,7 @@ class Time::Location
   # the time zone database.
   #
   # See `Time::Location.load` for details.
-  class InvalidLocationNameError < Exception
+  class InvalidLocationNameError < Time::Error
     getter name, source
 
     def initialize(@name : String, @source : String? = nil)
@@ -63,7 +63,7 @@ class Time::Location
 
   # `InvalidTimezoneOffsetError` is raised if `Time::Location::Zone.new`
   # receives an invalid time zone offset.
-  class InvalidTimezoneOffsetError < Exception
+  class InvalidTimezoneOffsetError < Time::Error
     def initialize(offset : Int)
       super "Invalid time zone offset: #{offset}"
     end

src/time/location/loader.cr

@@ -5,7 +5,7 @@ class Time::Location
   # time zone data.
   #
   # Details on the exact cause can be found in the error message.
-  class InvalidTZDataError < Exception
+  class InvalidTZDataError < Time::Error
     def self.initialize(message : String? = "Malformed time zone information", cause : Exception? = nil)
       super(message, cause)
     end