Add contrainers round trip checks

[yanganto]

• Based on #181, such that all the CI can be used for this feature branch
• Add round trips checks for Contract, Transfer, and Kit
• Impl FromStr traits for Contract, Transfer, and Kit
• Add checks for wrong armored strings

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.57282% with 10 lines in your changes are missing coverage. Please review.

:exclamation: No coverage uploaded for pull request base (develop@8ee3144). Click here to learn what that means.

Files	Patch %	Lines
src/containers/consignment.rs	94.3%	8 Missing :warning:
src/containers/kit.rs	96.4%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #199 +/- ## ========================================= Coverage ? 16.0% ========================================= Files ? 37 Lines ? 7105 Branches ? 0 ========================================= Hits ? 1140 Misses ? 5965 Partials ? 0 ``` | [Flag](https://app.codecov.io/gh/RGB-WG/rgb-std/pull/199/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RGB-WG) | Coverage Δ | | |---|---|---| | [rust](https://app.codecov.io/gh/RGB-WG/rgb-std/pull/199/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RGB-WG) | `16.0% <97.6%> (?)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=RGB-WG#carryforward-flags-in-the-pull-request-comment) to find out more.

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[dr-orlovsky]

shit, again wrong target branch