Rebase #177 - Shared breakpoints support (#693)

* Resolves #173 - Shared breakpoints support

* Added breakpoints full documentation

* Invalid breakpoint just throw JSONUtilities decoding error.

* Use enumeration types instead of String for extensionIDs

* Remove a necessary line

* Remove unnecessary custom Equatable implementation

* Update CHANGELOG.md

* Ignore empty breakpoints

* Update Docs/ProjectSpec.md

Fix a typo

Co-Authored-By: Yonas Kolb <yonaskolb@users.noreply.github.com>

* Change some properties that should be Int to Int

* Create 2 typealiases

* Use BreakpointType where it is missing

* Remove unused Location

* Change some names

* Add Breakpoint.Scope

* Add Breakpoint.StopOnStyle

* Change the type of the raw value to String

* Remove some properties that may cause confusing

* Require filePah and line when the type is .file

* Add tests about decoding breakpoints

* Add Breakpoint.Action.ConveyanceType

* Add default value for waitUntilDone

* Add Breakpoint.Action.SoundName

* Add tests about decoding breakpoint actions

* Fix some issues in ProjectSpec.md

* Improve ProjectSpec.md

* Add missing condition

* Add breakpoints to project.yml

* Use unwarp

* Remove the Breakpoint suffix

* Refactor BreakpointType

* Refactor Breakpoint.Action

* Remove unnecessary properties

* Adjust the line wrapping style for BreakpointGenerator

* Support column breakpoints

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Co-authored-by: Alex Rupérez <alejandro.ruperez@intelygenz.com>
Co-authored-by: Yonas Kolb <yonaskolb@users.noreply.github.com>