chore: update default stake on trade parameter upon account switch

[shafin-deriv]

This pull request includes changes to the trade_definition_tradeoptions block in the src/external/bot-skeleton/scratch/blocks/Binary/Trade Definition/trade_definition_tradeoptions.js file. The changes add checks for unsupported trade types and ensure that the minimum stake value is set correctly for certain currency blocks.

Key changes:

• Added a check to exclude unsupported trade types 'multiplier' and 'accumulator' from processing.
• Introduced additional checks to ensure that currency_block and currency_child_block exist before proceeding.
• Set the value of currency_child_block to the minimum stake when both currency_block and currency_child_block are present.

[github-actions]

Preview Link: https://shafin-BOT-2621-fix1.bot-65f.pages.dev

Name	Result
Build status	Completed ✅
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Action URL	Visit Action