feat(PSDK-586): Read contract support with type inference

[rohan-agarwal-coinbase]

What changed? Why?

• Installed tsd for testing types directly.
• Installed viem, abitype for type-inference support
• Created read_contract.ts with a readContract function that takes in an optional ABI. If an ABI is supplied, it uses type-inference to give compile-time warnings and tell the user the expected return type. Otherwise, unknown is returned.

Testing:

• Unit tests for the types directly, and unit tests for read contract for all the different types.
• I also did e2e testing with the backend service changes

Followup:

• In a separate PR, I'll update our github actions to also test the types with tsd. For now I ran it locally successfully

[cb-heimdall]

🟡 Heimdall Review Status

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Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1