fix:#7 Improve Error Handling in smart-contract

[shebll]

Description

• Improve Error Handling in smart-contract by extending Error class for making ContractConfigurationError for throw error instead of return undefined
• init the jest test config and install jest in -D
• move a test folder in src folder for better organizing
• make a unit test for getContract
• comment other unit tests it makes errors in the testing run
• todo for makeBeacon and fix other unit tests

Testing (ignore for documentation update)

• init the jest test config and install jest in -D
• move a test folder in src folder for better organizing
• make a unit test for getContract
• comment other unit tests it makes errors in the testing run
• todo for makeBeacon and fix other unit tests

Type of change

• Bug fix
• New feature
• Breaking change
• Documentation update

Checklist:

• I have read and agree to the Code of Conduct.
• I have signed the Contributor License Agreement (CLA).
• I have considered the Security Policy.
• I have self-reviewed and tested my code.
• I have updated documentation as needed.
• I agree to the project's custom license.

Additional Notes:

[CLAassistant]

All committers have signed the CLA.

[AbdulRashidReshamwala]

can you remove the packagelock changes from the pr will cause multiple issue during review

[adithyaakrishna]

@shebll Could you pls resolve the conflicts?