…ogressStrategy+Math

removed struct CustomLinearCareTaskProgress
removed all appearances of CustomLinearCareTaskProgress to LinearCareTaskProgress

Add new test cases for `computeProgressByAveragingOutcomeValues`, `computeProgressByMedianOutcomeValues`, and `computeProgressByStreakOutcomeValues` functions in the `CareTaskProgressStrategy` class. Covers varioues edge cases and increases overall test coverage.

feat: add kind parameter to computeProgress functions

Add a new `kind` parameter to `computeProgressByAveragingOutcomeValues`, `computeProgressByMedianOutcomeValues`, and `computeProgressByStreakOutcomeValues` functions in the `CareTaskProgressStrategy` class. This allows calculating progress for a specific kind of outcome.

removes all instances of force unwrapping to prevent potential crashes.
style: remove underscores for function, remove unnecessary comments, and formatting.

Added unit test to verify the handling of different kinds the 'computeProgressByAveragingOutcomeValues' function.
refacor: simplified value extraction from OCKOutcomeValue
Replaced instances of $0.numberValue?.doubleValue with $0.doubleValue to remove unnecessary casting.
style: improved readibility by adding new lines

Refactor tests to be able to unwrap optional values using guard statements
style: Reduced identation and also tab when needed
refactor: Use string variables for kinds to reduce programatic mistakes