feat: expose webrequest get page in html format to intelligent contract sintax

[cristiam86]

Fixes #478

What

• The web page in HTML format method (get_html) from the webrequest module has been exposed in the equivalence principle functions by adding a new parameter called "format" in the EquivalencePrinciple.get_webpage method

Why

• This is needed for some use cases

Testing done

• I ran the integration tests for the prediction market example

Decisions made

I added a new parameter to extend the current functionality instead of a new method that would require changes in the previous name, therefore breaking the existing examples.

Checks

• I have tested this code
• I have reviewed my own PR
• I have created an issue for this PR
• I have set a descriptive PR title compliant with conventional commits

Reviewing tips

Add format in the intelligent contract get_webpage and look at the result in the logs.

User facing release notes

Now, you can also get the content of a web page in HTML format; check the docs to learn how to pass an extra parameter to the get_webpage method and get the content in the format you prefer.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 17.20%. Comparing base (c4c2d77) to head (f49e6d5).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #486      +/-   ##
==========================================
- Coverage   17.90%   17.20%   -0.70%     
==========================================
  Files         111      111              
  Lines        7955     7903      -52     
  Branches      191      190       -1     
==========================================
- Hits         1424     1360      -64     
- Misses       6456     6468      +12     
  Partials       75       75              

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[github-actions]

🎉 This PR is included in version 0.7.0 🎉

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