Add initial GetDeclaredSymbol support for inferred VariableDeclaratorSyntax and SingleVariableDesignationSyntax nodes

Split liveshare handlers

Use AnalyzerConfigOptionsProvider when available

Use the SnapshotManager to store the variable types as it was already doing this, and handle nested scopes correctly.

Add GetDeclaredSymbol support for nullability in variable declarations. Not handled are linq or foreach iteration variable declarations.

Implement Quick Info styles

Fixes #36091

Analyzer driver performance fixes for IDE open file analysis

Use NullableAnnotation.NotAnnotated always for value type annotations in the public API.

Previously, the annotation was NotAnnotated if the type reference was from source and Disabled if the type reference was from metadata.

Fixes #34412

Fixes #37310
Fixes #37279

IDE0066 code fix adds parentheses when needed

This should allow us to query the azure event API to figure out if a particular run failed because of failure to build or test failure. This should help us categorize the causes of CI flakiness and drive it down.

React to Live Share Language Services API Changes

Remove data flow analysis from convert foreach to for refactoring

If it's written to a warning annotation is displayed in the refactoring window to warn that semantics may change.

Fixes #35933

Sort Traits.Features members alphabetically

Remove naming styles before generating field/property/parameter in constructor related refactorings (#36220)

* Fix for 35776

* helper struct implemented

* Respond to feedback

* Tests in progress

* Add tests

* fix tests

* fix tests

* Respond to feedback

* Handle empty base names

* Add test for recursive removal of prefixes, and other minor feedback responses

* Fix tests

Add dotnet-format feature branch to myget publishing