Restrict comments to 100 characters

This is a rule I try enforce in PR but it's a bit of a hassle, this will
give a lint warning when it happens resulting in:

- Yellow underline in supported editors when eslint is installed
- Compilation will succeed since it's a warning not an error
- CI will fail as it does not allow lint warnings

Special case comments are ignored which includes @vt comments, table
comments and commented out code.

src/common/Color.ts

@@ -106,7 +106,8 @@ export namespace color {
 }
 
 /**
- * Helper functions where the source type is "css" (string: '#rgb', '#rgba', '#rrggbb', '#rrggbbaa').
+ * Helper functions where the source type is "css" (string: '#rgb', '#rgba', '#rrggbb',
+ * '#rrggbbaa').
  */
 export namespace css {
   let $ctx: CanvasRenderingContext2D | undefined;