Changed the UI from combinations of radio buttons and check boxes to use
just checkboxes. Also changed how the partitions of `use var` space was
logically represented. We now present 3 options - use var on intrinsic
types, use var where apparent, use var in rest of the places. If all 3
are checked, we universally use var everywhere. If only one or a
combination less than 3 are selected, we use var only in those places.
An unchecked option means, user prefers explicit typing for that
scenario.

Not yet implemented : enforcement levels of the fix, fancy previews that
show results for a combination of choices, integrating the options into
code generation service.

Remove relay command implementation and usages in checkbox view model.
trying another UI approach to make this simpler.

Add RelayCommand to CheckBoxViewModel to enable/disable checkboxes in
option preview control depending on the state of other controls. The
StyleViewModel now makes use of this for Use Var feature.

Refactor UseImplicitTyping and UseExplicitTyping Analyzers to use an
abstract base class and share common functionalities. Also wire up
options into unit tests.

add options to codestyle for use implicit or explicit typing
analyzer/fixers.

Add an analyzer and fixer for using explicit type over var for C#. Plus,
unit tests.

Add logic to determine if return type information is obvious from the
initializer expression of variable declaration. Currently it recognizes
3 patterns - literals, object creation expressions and static helpers
like `int.Parse`

shelving, edit this commit later.

Initial implementation of a diagnostic analyzer and codefixer for `use
var` style in C#

Merge master into future

Disallow local byref void methods.

Fixes #8441

Ref returns and Locals

The feature needs to be properly implemented taking into account that variable is byref.
For now disabling this refactoring if variable happen to be byref to avoid crash as described in #8416

Ideally EE should not encounter ByRef types, but for now I just make EE resilient if it sees them

member declaration parse should not be considered not advanced when "ref" keyword was consumed.

Fixes #8402

Disable Failing Documentation Tests (Future)

This reverts commit e2fc5135.

This reverts commit eb1ede48.

This reverts commit e3c1ea08.

This reverts commit ec2622b3.

This reverts commit 8f26ffb5.

This reverts commit 662593ba.

This reverts commit 9190cb50.