Print doc comments above directive and decorators

[timotheeguerin]

fix #2095

Formatter will now format doc comment above directives and decorators. This only applies to doc comments. Regular line comments and block comments will remain where they are

#suppress "no-x" "X is needed"
@dec1
/**
 * Doc comment
 */
@dec2
model Foo {}

formats to

/**
 * Doc comment
 */
#suppress "no-x" "X is needed"
@dec1
@dec2
model Foo {}

Addition to the parser

BlockComment node has an optional property parsedAsDocs if the block comment was also parsed as a DocNode

Fix in the parser

The DocNode pos and end where showing not showing an accurate location. With single line doc comment pos===end and was pointing to /**<S><E> this is single line */

Changed it to point to <S>/** this is single line */<E>

[github-actions]

Changes in this PR will be published to the following url to try(check status of TypeSpec Pull Request Try It pipeline for publish status):
Playground: https://cadlplayground.z22.web.core.windows.net/prs/2114/

Website: https://cadlwebsite.z1.web.core.windows.net/prs/2114/

[timotheeguerin]

@mikeharder another formatter change, this one might be happening in the spec repo