Added new links

[GolfingSuccess]

Added a load of new links and quicks. Here is an explanation of each one:

• Ẓ: z + 2 (same as +2$ or ‘‘$ or ‘⁺$ or ‘2¡). (not sure about this one)
• Ẉ: z - 2 (same as _2$ or ’’$ or ’⁺$ or ’2¡). (not sure about this one too)
• Æ«: 2^z or 1 << z (same as 2*$). (again not sure)
• Øƈ: Get all input at once (no eval) (same as “”;ƈ$ÐL¤).
• ɲ: Call next link as a nilad quick (same as (link index + 1)£).
• ÐÞ: Reversed keyed sort quick (same as ÞṚ(max arity ¤$¥ quick)).
• ŒṢ: Reversed sort (same as ṢṚ$).
• Ż: Truncate to shortest length (same as ḣ€L€Ṃ$$).

(note: there might be bugs, although I've plucked some out already)

EDIT: I have improved the use of Jelly's naming conventions in this list. There might be a few problems because of the limited number of available single-byte tokens. Some may be:

• The choice of Ẓ and Ẉ for +2 and -2, since they could also represent the inverses of Z and W. However, Z doesn't have an inverse due to auto-wrapping non-lists in a list and W's single-byte inverse is X.

[cairdcoinheringaahing]

@GolfingSuccess wouldn't call = sys.stdin.read work for Øƈ? Wrapping it in a lambda just seems excessive.

[GolfingSuccess]

@SatansSon Sorry, I thought I didn't type the lambda: part, fixed.

[miles-cg]

@GolfingSuccess You should try to follow the Naming Conventions.

[GolfingSuccess]

@miles-cg I tried, but I wanted some single-byte monads...maybe I'll change them. BTW I followed the uppercase convention, but then couldn't follow the hook convention too, we're running out of single bytes for that purpose (although I could use Ẉ and Ẓ for the two hooked ones, because the inverse of Z is Z itself, and the inverse of W is X).

[GolfingSuccess]

NOTE: This PR has been closed since it adheres to an older version of the Jelly programming language.