feat: Remove types forwarding to interface in sv::messages

[kulikthebird]

TODO:

• JsonSchema implementation for contract's Exec, Query and Sudo message enums
• Improve sylvia generated code's lifetimes names to avoid collisions

[codecov]

Codecov Report

Attention: Patch coverage is 98.96907% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 84.74%. Comparing base (f8c1e55) to head (5165301).

Files	Patch %	Lines
sylvia-derive/src/parser/attributes/messages.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #361      +/-   ##
==========================================
+ Coverage   84.71%   84.74%   +0.02%     
==========================================
  Files          37       37              
  Lines        2598     2589       -9     
==========================================
- Hits         2201     2194       -7     
+ Misses        397      395       -2     

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[kulikthebird]

There are Json and TS API generated for the sylvia/examples/contracts/generic_contract:

execute.json
GenericContract.client.txt
GenericContract.types.txt

[jawoznia]

One more thing: Update MIGRATING.md.
I think two changes have to be mentioned which are required lifetimes in impl block and CodeId generic over a Contract.

Otherwise LGTM

[jawoznia]

Last small changes otherwise LGTM.

Basically do not link changes with specific feature as MIGRATING is supposed to group all the changes to specific version migration.