feat: Add support for `#[sv::]` attributes for all sylvia attribtues.

[kulikthebird]

This PR adds the requirement for sv:: prefix for all attributes handled by sylvia. Attributes wihtout sv:: prefix are not supported and are not handled by the macro.

Other than that, this change also introduces refactoring commits - the parser has been split into a multi-file module, and the interface has been unified.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.65217% with 84 lines in your changes are missing coverage. Please review.

Project coverage is 87.76%. Comparing base (9778555) to head (94363f5).

Files	Patch %	Lines
sylvia-derive/src/parser/entry_point.rs	0.00%	24 Missing :warning:
sylvia-derive/src/parser/attributes/mod.rs	72.34%	13 Missing :warning:
sylvia-derive/src/message.rs	62.96%	10 Missing :warning:
sylvia-derive/src/parser/attributes/messages.rs	74.07%	7 Missing :warning:
sylvia-derive/src/parser/mod.rs	65.00%	7 Missing :warning:
sylvia-derive/src/parser/attributes/msg.rs	88.63%	5 Missing :warning:
sylvia-derive/src/message_type.rs	94.36%	4 Missing :warning:
...rive/src/parser/attributes/override_entry_point.rs	81.81%	4 Missing :warning:
sylvia-derive/src/interfaces.rs	25.00%	3 Missing :warning:
sylvia-derive/src/parser/contract.rs	78.57%	3 Missing :warning:
... and 2 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #310 +/- ## ========================================== + Coverage 87.33% 87.76% +0.43% ========================================== Files 28 37 +9 Lines 2171 2150 -21 ========================================== - Hits 1896 1887 -9 + Misses 275 263 -12 ```

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