add(docs): create contribute.rst for contribution guidelines and pre-commit setup

Author: kelsoncm

docs/contribute.rst

@@ -0,0 +1,46 @@
+How to contribute
+=================
+
+.. code-block:: bash
+    git clone git@github.com:kelsoncm/sc4.git ~/projetos/PESSOAL/sc4py
+    code ~/projetos/PESSOAL/sc4py
+
+Pre-commit
+----------
+
+This repository uses [pre-commit](https://pre-commit.com/) to run quality checks
+before each commit and coverage regression checks before each push.
+
+**Setup:**
+
+.. code-block:: bash
+    python -m venv .venv
+    .venv\bin\activate
+    .\.venv\Scripts\Activate.ps1
+    pip install --upgrade pip uv
+    uv pip install --upgrade -e ".[dev]"
+    pre-commit install
+    pre-commit install --hook-type pre-push
+
+Run manually:
+
+.. code-block:: bash
+    pre-commit run --all-files
+    pre-commit run --hook-stage pre-push --all-files
+
+**Hooks:**
+
+* **pre-commit**
+   * `trailing-whitespace` for eliminating trailing whitespace
+   * `end-of-file-fixer` for ensuring files end with a newline
+   * `check-yaml` for validating YAML files
+   * `check-added-large-files` for preventing large files from being committed
+   * `black` for code formatting
+   * `ruff` for linting and static analysis
+   * `doc8` for checking documentation style
+   * `markdownlint` for checking Markdown style
+* **pre-push**:
+   * `pytest` for running tests
+   * `pytest-coverage-gate` for checking test coverage
+* **GitHub Actions only**
+   * `semgrep` for security and code quality checks

docs/index.rst

@@ -116,3 +116,4 @@ Next steps
    api-readers
    api-renders
    api-hydrating
+   contribute