Remove create contingencies menu item

[nashousni]

Please check if the PR fulfills these requirements (please use '[x]' to check the checkboxes, or submit the PR and then click the checkboxes)

• [x ] The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Does this PR already have an issue describing the problem ? If so, link to this issue using '#XXX' and skip the rest
no

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
feature

What is the new behavior (if this is a feature change)?
The "Create contingencies " menu item can be removed by the user by setting the config file visible property to false:
example :

contingency-creator-extension-menu:
visible: false

Does this PR introduce a breaking change or deprecate an API? If yes, check the following:

• The Breaking Change or Deprecated label has been added
• The migration guide has been updated in the github wiki (What changes might users need to make in their application due to this PR?)
  no breaking change

Other information:

(if any of the questions/checkboxes don't apply, please delete them entirely)

[pl-buiquang]

The black/whitelisting of extension should be external to the extension definition.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

0.0% Coverage
0.0% Duplication