docs: Create framework for docs

[mortenengen]

General

• [x] Write configuration
• [x] Installation
• [x] Quickstart example
• [x] Examples
• [x] API reference
• [x] Theory reference
• [x] Update and pin versions

API reference

Library structure

• [x] Brief description of the hierarchy and modularity of the library

Codes

• [x] General functions

EC2 2004

• [x] Fix docstrings
• [x] Set public API
• [x] Autodoc functions

EC2 2023

• [x] Fix docstrings
• [x] Set public API
• [x] Autodoc functions

Model Code 2010

• [x] Fix docstrings
• [x] Set public API
• [x] Autodoc functions

Materials

• [x] Concretes
• [x] Reinforcement steels
• [x] Constitutive laws
• [x] Fix docstrings

Geometry

• [x] General geometry
• [x] Steel sections geometries
• [x] Fix docstrings
• [x] @talledodiego: can you please add a docstring to SurfaceGeometry.split_two_lines?

Sections

• [x] Generic section class
• [x] Functions for adding reinforcement
• [x] Fix docstrings
• [x] @talledodiego: can you please add a description of the returns from .prepare_input, .integrate, and .integrate_strain_response_on_geometry in the docstrings of our integrators?

[mortenengen]

Here is the initial framework for the docs, @talledodiego. Please have a look and give your comments 😃

[talledodiego]

I committed the docstrings you asked. @mortenengen do you think it is ok now?

[mortenengen]

I committed the docstrings you asked. @mortenengen do you think it is ok now?

Thanks 😃 I think this is good for now.