Nebula t0-003 Integration

[0xFirekeeper]

Closes TOOL-4323

---

PR-Codex overview

This PR focuses on updating the Thirdweb AI library by modifying constants, refactoring data classes, and removing unused classes related to feedback. It enhances the context handling for chat and execution parameters while improving code clarity.

Detailed summary

• Updated NEBULA_DEFAULT_MODEL from "t0-001" to "t0-003".
• Replaced ContextFilter with CompletionContext in various classes.
• Removed ExecuteConfig, ContextFilter, and Feedback classes.
• Introduced DeployedContract class for smart contract representation.
• Refactored PrepareContextFilter method to utilize the new context structure.
• Updated test cases to reflect changes in context handling and removed commented-out tests.

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[linear]

TOOL-4323 Nebula t0-003

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 65.38462% with 9 lines in your changes missing coverage. Please review.

Please upload report for BASE (main@b8788c1). Learn more about missing BASE report.
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
Thirdweb/Thirdweb.AI/ThirdwebNebula.Types.cs	58.33%	5 Missing ⚠️
Thirdweb/Thirdweb.AI/ThirdwebNebula.cs	71.42%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #147   +/-   ##
=======================================
  Coverage        ?   64.41%           
=======================================
  Files           ?       40           
  Lines           ?     6121           
  Branches        ?      793           
=======================================
  Hits            ?     3943           
  Misses          ?     1991           
  Partials        ?      187           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.