400 for user errors on contract read

[d4mr]

PR-Codex overview

This PR focuses on enhancing error handling in the read function of the contract and adding a new test case to verify the behavior when reading a contract with incorrect parameters.

Detailed summary

• Added a new test case in test/e2e/tests/read.test.ts for handling incorrect contract reads, expecting a 400 error.
• Improved error handling in src/server/routes/contract/read/read.ts to throw a custom error for specific function call issues.
• Updated return type for returnData to unknown and used as any for the response.

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