Fix Switch level deployment failure - Issue #837

[JunaidCD]

Bug Fix Summary

• Fixed Switch level deployment failures caused by insufficient gas limits
• Updated deprecated MetaMask sendAsync to modern ethereum.request()
• Added proper error handling to prevent frontend crashes
• Increased instanceGas from 250,000 to 1,000,000 for Switch level

Issue Reference

Fixes #837 where Switch level instance deployment fails with transaction reverts and frontend crashes.

Changes Made

• client/src/utils/ethutil.js:
  Updated MetaMask integration from deprecated sendAsync to modern ethereum.request() with proper error handling
• client/src/gamedata/gamedata.json:
  Increased Switch level instanceGas from 250,000 to 1,000,000

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[JunaidCD]

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