✨ Implement root model serialization

[lig]

Implement serialization for root model. Required for pydantic/pydantic#5765

Deduplicated some related error messages to simplify debugging.

Selected Reviewer: @adriangb

[codspeed-hq]

CodSpeed Performance Report

Merging #613 5498-add-rootmodel-to-pydantic (306002a) will not alter performances.

Summary

🔥 0 improvements
❌ 0 regressions
✅ 119 untouched benchmarks

🆕 0 new benchmarks
⁉️ 0 dropped benchmarks

[codecov-commenter]

Codecov Report

Merging #613 (e33034c) into main (c818c3e) will decrease coverage by 0.03%.
The diff coverage is 84.84%.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #613      +/-   ##
==========================================
- Coverage   94.19%   94.17%   -0.03%     
==========================================
  Files          98       98              
  Lines       13189    13204      +15     
  Branches       25       25              
==========================================
+ Hits        12424    12435      +11     
- Misses        759      763       +4     
  Partials        6        6              

Impacted Files	Coverage Δ
src/serializers/type_serializers/function.rs	95.14% <68.75%> (-0.58%)	⬇️
src/serializers/type_serializers/model.rs	94.65% <100.00%> (+0.69%)	⬆️

... and 2 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c818c3e...e33034c. Read the comment docs.

[adriangb]

please review