docs: Improvements on the docs, removing jupyterlite

[fgmacedo]

Improvements on:

• Django Integration.
• Diagram generation.
• Fixed SM html repr on examples gallery.
• Fixed a few grammar errors.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (2d5be3b) compared to base (2884494).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop      #331   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines          759       770   +11     
  Branches       126       107   -19     
=========================================
+ Hits           759       770   +11     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
statemachine/contrib/diagram.py	100.00% <100.00%> (ø)
statemachine/statemachine.py	100.00% <100.00%> (ø)

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