* Remove unnecessary wrapper classes in ts.formatting.Rule
* RulesProvider -> immutable FormatContext
* Remove Rules class, just use a list of rules
* Remove Shared namespace, replace Shared.TokenRange with TokenRange
* Simplify TokenRange
* Separate Rule and RuleSpec
* Move FormattingRequestKind to formattingContext.ts
* Simplify references
* Fix lint
* Revert removal of trailing newlines