Mouse button remapping and addition of supplementary data visualisation

[smoia]

Closes #42 #46 #49

Proposed Changes

There's many, among the most important:

• It is possible to add peaks, not only remove them - by default, the behaviour is left drag remove, right drag add, central button drag exclude signal as bad
• Physiological objects can get a supplementary timeseries at object initialisation - that helps in viewing multiple physiological processes at once and decide if the peaks in one are true peaks or noise
• There are more contributors! And contributions.

Change Type

• bugfix (+0.0.1)
• minor (+0.1.0)
• major (+1.0.0)
• refactoring (no version update)
• test (no version update)
• infrastructure (no version update)
• documentation (no version update)
• other

Checklist before review

• I added everything I wanted to add to this PR.
• [Code or tests only] I wrote/updated the necessary docstrings.
• [Code or tests only] I ran and passed tests locally.
• [Documentation only] I built the docs locally.
• My contribution is harmonious with the rest of the code: I'm not introducing repetitions.
• My code respects the adopted style, especially linting conventions.
• The title of this PR is explanatory on its own, enough to be understood as part of a changelog.
• I added or indicated the right labels.

• I added information regarding the timeline of completion for this PR.

• Please, comment on my PR while it's a draft and give me feedback on the development!