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.

addons/xterm-addon-image/src/IIPHeaderParser.ts

@@ -23,7 +23,8 @@ export interface IHeaderFields {
   height?: string;
   // Optional, defaults to 1 respecting aspect ratio (width takes precedence).
   preserveAspectRatio?: number;
-  // Optional, defaults to 0. If set to 1, the file will be displayed inline, else downloaded (download not supported).
+  // Optional, defaults to 0. If set to 1, the file will be displayed inline, else downloaded
+  // (download not supported).
   inline?: number;
 }