Add comprehensive Sphinx documentation structure and content

Co-authored-by: r41k0u <76248539+r41k0u@users.noreply.github.com>

docs/getting-started/index.md

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+# Getting Started
+
+Welcome to PythonBPF! This section will help you get started with writing eBPF programs in Python.
+
+## What You'll Learn
+
+In this section, you'll learn how to:
+
+1. **Install PythonBPF** - Set up your development environment with all necessary dependencies
+2. **Write Your First Program** - Create a simple BPF program to understand the basics
+3. **Understand Core Concepts** - Learn about decorators, compilation, and program structure
+
+## Prerequisites
+
+Before you begin, make sure you have:
+
+* A Linux system (eBPF requires Linux kernel 4.15+)
+* Python 3.10 or higher
+* Root or sudo access (required for loading BPF programs)
+* Basic understanding of Python programming
+
+## Quick Navigation
+
+```{toctree}
+:maxdepth: 1
+
+installation
+quickstart
+```
+
+## Next Steps
+
+After completing the getting started guide, you can:
+
+* Explore the {doc}`../user-guide/index` for detailed information on features
+* Check out the {doc}`../api/index` for complete API reference
+* Browse the [examples directory](https://github.com/pythonbpf/Python-BPF/tree/master/examples) for more complex programs
+
+## Need Help?
+
+If you encounter any issues:
+
+* Check the [GitHub Issues](https://github.com/pythonbpf/Python-BPF/issues) for known problems
+* Review the [README](https://github.com/pythonbpf/Python-BPF/blob/master/README.md) for additional information
+* Reach out to the maintainers: [@r41k0u](https://github.com/r41k0u) and [@varun-r-mallya](https://github.com/varun-r-mallya)