Remove debug internal option completely and add option APIs

src/common/services/OptionsService.ts

@@ -45,7 +45,6 @@ export const DEFAULT_OPTIONS: ITerminalOptions = Object.freeze({
   convertEol: false,
   termName: 'xterm',
   screenKeys: false,
-  debug: false,
   cancelEvents: false,
   useFlowControl: false,
   wordSeparator: ' ()[]{}\'"'

src/common/services/Services.d.ts

@@ -94,7 +94,6 @@ export interface ITerminalOptions {
   cols: number;
   cursorBlink: boolean;
   cursorStyle: 'block' | 'underline' | 'bar';
-  debug: boolean;
   disableStdin: boolean;
   drawBoldTextInBrightColors: boolean;
   fontSize: number;