feat: more trading infos by parsing more from trading summary endpoint

[azerpas]

Add account optional field in TradingSummaryItem which contains useful infos like cash, activationDate, pricingName, etc...

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 33.55%. Comparing base (093a22a) to head (d6ed115).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #57   +/-   ##
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  Coverage   33.55%   33.55%           
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  Files           9        9           
  Lines         304      304           
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  Hits          102      102           
  Misses        202      202           

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[Copilot]

Pull request overview

This PR extends trading summary parsing to include account-level details, exposing additional fields such as cash, activationDate, and pricingName via an optional account field on TradingSummaryItem.

• Add optional account: Option to TradingSummaryItem
• Update README macOS run instructions for quarantine removal and MFA note
• Bump package version to 0.4.0

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/bourso_api/src/client/trade/mod.rs	Adds account details to TradingSummaryItem alongside positions parsing.
README.md	Revises macOS app approval steps and clarifies MFA requirements.
Cargo.toml	Updates package version to 0.4.0 to reflect new features.

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[Mathious6]

Good job 💪