Functions: Logical

[nhatcher]

Note that LAMBDA has its own ticket (see #43). LET is also an important function on its own.

• [x] AND
• [ ] BYCOL
• [ ] BYROW
• [x] FALSE
• [x] IF
• [x] IFERROR
• [x] IFNA
• [x] IFS
• [ ] LAMBDA
• [ ] LET
• [ ] MAKEARRAY
• [ ] MAP
• [x] NOT
• [x] OR
• [ ] REDUCE
• [ ] SCAN
• [x] SWITCH
• [x] TRUE
• [x] XOR