feat(workouteditor): add workoutEditor

[danielkov]

Description

Users will be able to create workouts and save them on their device. There will also be an option to download the workout in ERG, MRC and possibly other formats (ZWO?).

The workout consists of intervals that can be edited (from, to, duration).

User is also able to create sections, that are a collection of intervals that can be added from a list to the workout.

Workout metrics update in real-time to reflect the current difficulty and zones of the workout.

Motivation and Context

These workouts can be compatible with different platforms, but ultimately the goal is to use these workout on the Cycloop platform as a form of training. There aren't many workout editors out there, and there certainly aren't ones that work well on mobile, which is why this can be a huge asset for users who are trying to quickly throw together something to do in the evening, without having to boot up their computers.

How Has This Been Tested?

The editor should work on all supported devices and look good on mobile (iOS and Android).

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

The following list has to be implemented:

• Editor page
• Editor UI
• Workout visualizer
• Create intervals
• Add intervals
• Create sections
• Save sections
• Add sections
• View saved sections
• Save workouts
• View saved workouts
• Edit saved workouts
• Download workouts