Adds a lint workflow and templates for PR and Issues

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Create a report to help us improve
+title: '[BUG] '
+labels: bug
+assignees: ''
+---
+
+## Describe the Bug
+<!-- A clear and concise description of what the bug is -->
+
+## To Reproduce
+
+Steps to reproduce the behavior:
+
+1. Run command '...'
+2. Use file '...'
+3. See error
+
+## Expected Behavior
+<!-- A clear and concise description of what you expected to happen -->
+
+## Actual Behavior
+<!-- A clear and concise description of what actually happened -->
+
+## Screenshots/Logs
+<!-- If applicable, add screenshots or logs to help explain your problem -->
+
+## Environment
+
+- OS: [e.g. macOS 14.2]
+- Python Version: [e.g. 3.13]
+- pdf2txt Version: [e.g. 0.1.0]
+- Tesseract Version: [e.g. 5.3.3]
+
+## Additional Context
+<!-- Add any other context about the problem here -->

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea for this project
+title: '[FEATURE] '
+labels: enhancement
+assignees: ''
+---
+
+## Is your feature request related to a problem?
+<!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
+
+## Describe the solution you'd like
+<!-- A clear and concise description of what you want to happen -->
+
+## Describe alternatives you've considered
+<!-- A clear and concise description of any alternative solutions or features you've considered -->
+
+## Example Use Case
+<!-- Provide an example of how this feature would be used -->
+
+## Additional Context
+<!-- Add any other context, screenshots, or examples about the feature request here -->

.github/pull_request_template.md

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+## Description
+<!-- Describe your changes in detail -->
+
+## Motivation and Context
+<!-- Why is this change required? What problem does it solve? -->
+
+## Type of Change
+<!-- Please delete options that are not relevant -->
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+
+## How Has This Been Tested?
+<!-- Please describe the tests that you ran to verify your changes -->
+
+## Checklist
+
+- [ ] My code follows the style guidelines of this project
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing tests pass locally with my changes

.github/workflows/lint.yml

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+name: Lint
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+          cache: "uv"
+
+      - name: Install uv
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          uv --version
+
+      - name: Install dependencies
+        run: |
+          uv pip install --system ruff
+
+      - name: Run linting
+        run: ruff check .