docs(frontend/python): overhaul python frontend docs

docs/SUMMARY.md

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+# Table of contents
+
+* [What is Concrete?](README.md)
+
+## Getting Started
+
+* [Installation](getting-started/installing.md)
+* [Quick Start](getting-started/quick\_start.md)
+* [Compatibility](getting-started/compatibility.md)
+* [Exactness](getting-started/exactness.md)
+* [Performance](getting-started/performance.md)
+
+## Tutorials
+
+* [Decorator](tutorial/decorator.md)
+* [Formatting](tutorial/formatting.md)
+* [Tagging](tutorial/tagging.md)
+* [Extensions](tutorial/extensions.md)
+* [Table Lookups](tutorial/table\_lookups.md)
+* [Rounded Table Lookups](tutorial/rounded\_table\_lookups.md)
+* [Floating Points](tutorial/floating\_points.md)
+* [Simulation](tutorial/simulation.md)
+* [Direct Circuits](tutorial/direct\_circuits.md)
+* [Key Value Database](tutorial/key\_value\_database.md)
+
+## How To
+
+* [Configure](howto/configure.md)
+* [Debug](howto/debug.md)
+* [Deploy](howto/deploy.md)
+
+## Developer
+
+* [Contribute](dev/contributing.md)
+* [Terminology and Structure](dev/terminology\_and\_structure.md)
+* [Compilation](dev/compilation.md)
+* [Fusing](dev/fusing.md)