✨ Added LibRLP.sol with clz

[atarpara]

Description

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Checklist

Ensure you completed all of the steps below before submitting your pull request:

• Ran forge fmt?
• Ran forge test?

Pull requests with an incomplete checklist will be thrown out.

[github-actions]

Gas Snapshot Comparison Report

Generated at commit : d779940, Compared to commit : 166f85b

Contract Name	Test Name	Main Gas	PR Gas	Diff
LibRLPWithCLZTest	testComputeAddressForLargeNonces()	-	1750	-
	testComputeAddressForSmallNonces()	-	997	-
	testComputeAddressOriginalForLargeNonces()	-	3495	-
	testComputeAddressOriginalForSmallNonces()	-	2088	-
	testRLPEncodeBytes()	-	250090	-
	testRLPEncodeBytes2()	-	155904	-
	testRLPEncodeList()	-	735942	-
	testRLPEncodeList2()	-	810708	-
	testRLPEncodeListEdgeCases()	-	1807743	-
	testRLPEncodeStringEdgeCases()	-	20424	-
	testRLPEncodeUint()	-	1175570	-
	testRLPPUint256()	-	363834	-
	test__codesize()	-	18292	-

[tekkac]

Gave your PR a quick look. nice use of clz.

I found potential clz use in two more spots.
gas savings is minimal though (approx 6 gas per call)

[atarpara]

@tekkac thanks for review. Applied your all suggestion.