Add storage cost estimation for each contract method

[AnnabelJoe]

Category: Backlog

Description: Add storage cost estimation for each contract method.

Note: recreated without labels after earlier label errors.

[OnyemaAnthony]

@OnyemaAnthony has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Maintainer please assign this issue to me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @OnyemaAnthony to this issue.

[ToryMic]

@ToryMic has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello Maintainer, please let me work on your project.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @ToryMic to this issue.