Introduces Probes by enhancing existing SBWatch

[JoeAtHPI]

Currently, SBWatches can be added globally or bound to examples to expressions. They count the number of executions, further display the last evaluated value resulting from the expression.
This MR takes an inspiration from Babylonian S and enhances the locally bound example watches to act like Probes.

• Instead of the last value, all values from an example run are displayed
• Example watches reset with every new example evaluation run
• Modify expressions can be set. This transforms the watched expression values however users see fit, e.g. to display Form objects. Or, imitate assertions as seen in the below screenshot
• Objects transform themselves into WatchValue morphs instead of using the convert actions to be more compact. They are more flexible with the representation overall

[JoeAtHPI]

should this be sorted?

[github-actions]

Pull Request Test Coverage Report for Build 5866909586

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 0.0%

---

Totals
Change from base Build 5806724678:	0.0%
Covered Lines:	0
Relevant Lines:	0

---

💛 - Coveralls

[tom95]

Great work, thank you!