⚙️ Add GitHub Actions workflow for build and test

[szmyty]

Title: ⚙️ Add GitHub Actions workflow for build and test

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Description

Create a GitHub Actions workflow to automatically:

• build the project
• run tests
• validate compilation

on every push and pull request.

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Goals

• Ensure CI reliability
• Catch regressions early
• Establish automation baseline

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Requirements

• Create workflow:

.github/workflows/ci.yml

• Trigger on:

  • push
  • pull_request

• Steps:

  • checkout repo
  • install Rust toolchain
  • run:

cargo build
cargo test

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Acceptance Criteria

• CI runs on push and PR
• Build completes successfully
• Tests execute and pass
• Workflow is clean and readable