chore: add GitHub issue templates, PR template, and Dependabot config

Author: Coding-Dev-Tools

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report a bug 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. Install the tool: `pip install ...`
+2. Run command: `...`
+3. See error
+
+**Expected Behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots / Logs**
+If applicable, add screenshots or error logs to help explain your problem.
+
+**Environment (please complete):**
+- OS: [e.g. macOS 14, Ubuntu 22.04, Windows 11]
+- Python version: [e.g. 3.11]
+- Tool version: `tool --version`
+
+**Additional Context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://revenueholdings.dev
+    about: Check the documentation first
+  - name: Security Concern
+    url: https://github.com/Coding-Dev-Tools/security
+    about: Please report security vulnerabilities privately

.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? Please describe.**
+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.
+
+**Use Case**
+How would this feature be used? Who would benefit from it?
+
+**Additional Context**
+Add any other context or screenshots about the feature request here.

.github/PULL_REQUEST_TEMPLATE.md

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+## Description
+
+Please include a summary of the change and which issue is fixed.
+
+Fixes # (issue)
+
+## Type of Change
+
+- [ ] Bug fix (non-breaking change fixing an issue)
+- [ ] New feature (non-breaking change adding functionality)
+- [ ] Breaking change (fix or feature that breaks existing behavior)
+- [ ] Documentation update
+- [ ] Dependency update
+
+## How Has This Been Tested?
+
+- [ ] `pytest` passes locally
+- [ ] Manual test with sample data
+
+## Checklist
+
+- [ ] My code follows the project's style guidelines
+- [ ] I have added tests that prove my fix/feature works
+- [ ] All new and existing tests pass
+- [ ] I have updated the documentation accordingly
+- [ ] I have added a CHANGELOG entry

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+    commit-message:
+      prefix: "deps"
+      prefix-development: "deps(dev)"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    open-pull-requests-limit: 5
+    labels:
+      - "ci"