update doc & userguide

[JulienT01]

update some doc and add on user guide : Save & Load Agents (In construction) Save & Load Data (In construction)

Checklist

• [x] My code follows the style guideline To check : black --check examples rlberry *py flake8 --select F401,F405,D410,D411,D412 --exclude=rlberry/check_packages.py --per-file-ignores="init.py:F401",
• [x] I have commented my code, particularly in hard-to-understand areas,
• [x] I have made corresponding changes to the documentation,
• [x] I have added tests that prove my fix is effective or that my feature works,
• [x] New and existing unit tests pass locally with my changes,
• [x] If updated the changelog if necessary,
• [x] I have set the label "ready for review" and the checks are all green.

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc failed. Look up the reason here: https://github.com/rlberry-py/rlberry/actions/workflows/preview.yml

[github-actions[bot]]

Hello, The build of the doc failed. Look up the reason here: https://github.com/rlberry-py/rlberry/actions/workflows/preview.yml

[github-actions[bot]]

Hello, The build of the doc failed. Look up the reason here: https://github.com/rlberry-py/rlberry/actions/workflows/preview.yml

[github-actions[bot]]

Hello, The build of the doc failed. Look up the reason here: https://github.com/rlberry-py/rlberry/actions/workflows/preview.yml

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr

[github-actions[bot]]

Hello, The build of the doc succeeded. The documentation preview is available here: https://rlberry-py.github.io/rlberry/preview_pr