Improved ReSearchingLiteralRule by giving an example in description & added automatic transformation

[Alokzh]

Fixes: #18021

Changes:

1. Added an example in description of ReSearchingLiteralRule.
2. Implemented automatic transformation to make sure that repeated literal equality tests are replaced with a more efficient includes: method on a literal array

Testing:

1. All testcase pass locally
2. Verified the transformations with some examples locally

Screencast:

Screencast.from.22-03-25.12.47.48.PM.IST.webm

[jecisc]

There is a failing test:

[Alokzh]

@jecisc Rule was not able to handle the complex comparisons such as empty collections (#()), so I added that & now it works

Here was the code in RBSmalllintTestObject class due to which test was failing

searchingLiteral
	^ self printString = #a or: [
		  #(  ) = self printString | (#(  ) == self printString) ]