Argdantic

**What's new**
- Nothing, unfortunately.

**Bugfixes**
- Help docstring now appears also with a single command.

**What's new**
- Porting to Pydantic V2 complete
- Overall refactoring, hopefully without introducing new bugs

**Bugfixes**
- Fix project dependencies
- Fix configuration stores

**What's new**
- Nothing unfortunately

**Bugfixes**
- Force pydantic 1.10 until the V2 update is ready

**What's new**

- Improve type handling decoupling `metavar` from the actual `type` (27)
- Improve help messages with new metavars for specific types supported by pydantic (e.g., dates, emails)
- Add configuration stores to save the validated command model to file (YAML, JSON, TOML) (29)

**Bugfixes**
- Nothing to report, good news!

**What's new**

- Add singleton configuration to allow for a single root model as input (24)
- Expand the documentation, add examples (25)

**Bugfixes:**
- top-level names are not forced when using singletons (24)
- `List` of complex types (e.g., `date`) now working as expected (26)

**What's new**

- Add documentation (21)
- Add new examples for defaults (20)
- Improve help and validation errors (20, 23)

**Bugfixes:**
- unknown `pydantic` types will now behave like strings until validated (23)
- `pydantic` errors will not print the full strack trace anymore (23)