adds formatter option for preserving comments

[dzsquared]

Description

resolves #20

enables the code formatter to preserve T-SQL comments, including

-- comments leading any T-SQL

/* comments
that span
multiple lines */

-- single line comments anywhere in the code

/********************
gigantic multiline
masterpiece comments
**********/


/*** comments
-- where more comments
are nested within
***/

Code Changes

• [ ] Unit tests are added, if possible
• [ ] Existing tests are passing
• [ ] New or updated code follows the guidelines here

[madskristensen]

Well, this is exciting :)

[madskristensen]

Merge, merge, merge :)

[dzsquared]

Merge, merge, merge :)

almost! there's a few more scenarios I'm getting sorted out.