Add bootstrap manager.

[piotrm50]

Description of change

Add bootstrap manager that keeps track of bootstrap status of tangle and notarization manager and triggers an event when both are bootstrapped.

Type of change

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• Enhancement (a non-breaking change which adds functionality)

How the change has been tested

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Make sure to provide instructions for the maintainer as well as any relevant configurations.

Change checklist

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• My code follows the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[karimodm]

Awesome! Just a few minor comments.

[jonastheis]

Why are those needed?

[piotrm50]

dependencies are needed to create an instance of the Manager by calling newManager function. This is handled internally by dig library. pluginDeps is needed so that we can call pluginDeps.BootstrapManager.Setup() in the configure method. If I put it in pluginDeps as a parameter to newManager, it caused a cyclic dependency or something and didn't work.

github has a problem and can't merge