Error taxonomy and upgrades

[JoaquinSkorg]

Closes #425

---

Named and added new errors in error.rs, and improved code logic in related files to ensure compatibility with these upgrades. Created the following files to upgrade code logic :

• mod.rs — Wires test modules together for structured suite organization.
• error_scenarios.rs — Regression tests for real-world error recovery workflows.
• ERROR_HANDLING_ANALYSIS.md — Audits 45 error variants across 5 categories; flags 3 critical bare panics.
• ERROR_PATH_MAPPING_FIXES.md — Replaces bare panic!() calls with typed error variants across all failure paths.
• ERROR_TESTING_GUIDE.md — 476+ lines of tests covering error classification, recovery, messaging, and analytics.

[drips-wave]

@JoaquinSkorg Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits