[WIP] Add support for input API in DMOD

[Copilot]

• Understand the issue: Add support for DMOD input API functions (Dmod_Gets, Dmod_Getc)
• Explore repository structure and understand existing dmlog input functionality
• Review DMOD SAL input interface requirements
• Verify existing tests pass
• Implement Dmod_Getc to read character from dmlog input buffer
• Implement Dmod_Gets to read string from dmlog input buffer
• Add unit tests for new input API functions
• Run tests and verify all pass (5/5 tests pass)
• Run code review

Original prompt

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This section details on the original issue you should resolve

<issue_title>Dodać wsparcie dla input API DMOD</issue_title>
<issue_description>Dmod został rozszerzony o funkcje input, takie jak np Dmod_Gets czy Dmod_Getc - powinniśmy je zaimplementować </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Dodać wsparcie dla input API DMOD #46

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