Remove TypeScript path mappings in favor of relative imports

Fixes https://github.com/xtermjs/xterm.js/issues/5896

TypeScript path mappings for common/*, browser/*, and headless/*
were not rewritten in emitted JavaScript, which forced webpack resolve
aliases and NODE_PATH workarounds so runtime could resolve modules.
That added build complexity and broke tooling such as ESLint import/no-cycle.

Changes:
- Convert ~750 imports across src/, addons/, and test/ to relative paths
- Remove common/browser/headless paths and src catch-all mappings from tsconfigs
  (keep @xterm/addon-* demo and addon typings paths)
- Remove webpack resolve.alias for common, browser, headless, and vs
- Drop NODE_PATH from unit tests, benchmarks, and VS Code launch config
- Fix addon-image IIPImageStorage to import ./Types after removing catch-all *

Verified: npm run build, esbuild, package, package-headless
Co-authored-by: Cursor <cursoragent@cursor.com>

src/common/input/Keyboard.test.ts

@@ -1,7 +1,7 @@
 
 import { assert } from 'chai';
-import { evaluateKeyboardEvent } from 'common/input/Keyboard';
-import { IKeyboardResult, IKeyboardEvent } from 'common/Types';
+import { evaluateKeyboardEvent } from './Keyboard';
+import { IKeyboardResult, IKeyboardEvent } from '../Types';
 
 /**
  * A helper function for testing which allows passing in a partial event and defaults will be filled

src/common/input/Keyboard.ts

@@ -4,8 +4,8 @@
  * @license MIT
  */
 
-import { IKeyboardEvent, IKeyboardResult, KeyboardResultType } from 'common/Types';
-import { C0 } from 'common/data/EscapeSequences';
+import { IKeyboardEvent, IKeyboardResult, KeyboardResultType } from '../Types';
+import { C0 } from '../data/EscapeSequences';
 
 // reg + shift key mappings for digits and special chars
 const KEYCODE_KEY_MAPPINGS: { [key: number]: [string, string]} = {

src/common/input/KittyKeyboard.test.ts

@@ -1,7 +1,7 @@
 
 import { assert } from 'chai';
-import { KittyKeyboard, KittyKeyboardEventType, KittyKeyboardFlags } from 'common/input/KittyKeyboard';
-import { IKeyboardEvent } from 'common/Types';
+import { KittyKeyboard, KittyKeyboardEventType, KittyKeyboardFlags } from './KittyKeyboard';
+import { IKeyboardEvent } from '../Types';
 
 function createEvent(partialEvent: Partial<IKeyboardEvent> = {}): IKeyboardEvent {
   return {

src/common/input/KittyKeyboard.ts

@@ -6,8 +6,8 @@
  * @see https://sw.kovidgoyal.net/kitty/keyboard-protocol/
  */
 
-import { IKeyboardEvent, IKeyboardResult, KeyboardResultType } from 'common/Types';
-import { C0 } from 'common/data/EscapeSequences';
+import { IKeyboardEvent, IKeyboardResult, KeyboardResultType } from '../Types';
+import { C0 } from '../data/EscapeSequences';
 
 /**
  * Kitty keyboard protocol enhancement flags (bitfield).

src/common/input/TextDecoder.test.ts

@@ -4,7 +4,7 @@
  */
 
 import { assert } from 'chai';
-import { StringToUtf32, stringFromCodePoint, Utf8ToUtf32, utf32ToString } from 'common/input/TextDecoder';
+import { StringToUtf32, stringFromCodePoint, Utf8ToUtf32, utf32ToString } from './TextDecoder';
 
 
 // convert UTF32 codepoints to string

src/common/input/UnicodeV6.test.ts

@@ -4,7 +4,7 @@
  */
 
 import { assert } from 'chai';
-import { UnicodeV6 } from 'common/input/UnicodeV6';
+import { UnicodeV6 } from './UnicodeV6';
 
 it('wcwidth should match all values from the old implementation', function(): void {
   // new implementation

src/common/input/UnicodeV6.ts

@@ -2,8 +2,8 @@
  * Copyright (c) 2019 The xterm.js authors. All rights reserved.
  * @license MIT
  */
-import { IUnicodeVersionProvider, UnicodeCharProperties, UnicodeCharWidth } from 'common/services/Services';
-import { UnicodeService } from 'common/services/UnicodeService';
+import { IUnicodeVersionProvider, UnicodeCharProperties, UnicodeCharWidth } from '../services/Services';
+import { UnicodeService } from '../services/UnicodeService';
 
 const BMP_COMBINING = [
   [0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],

src/common/input/Win32InputMode.test.ts

@@ -4,8 +4,8 @@
  */
 
 import { assert } from 'chai';
-import { Win32InputMode, Win32ControlKeyState } from 'common/input/Win32InputMode';
-import { IKeyboardEvent, KeyboardResultType } from 'common/Types';
+import { Win32InputMode, Win32ControlKeyState } from './Win32InputMode';
+import { IKeyboardEvent, KeyboardResultType } from '../Types';
 
 type EventOpts = Partial<IKeyboardEvent>;
 const ev = (opts: EventOpts): IKeyboardEvent => ({

src/common/input/Win32InputMode.ts

@@ -14,8 +14,8 @@
  *   Rc: Repeat count (usually 1)
  */
 
-import { IKeyboardEvent, IKeyboardResult, KeyboardResultType } from 'common/Types';
-import { C0 } from 'common/data/EscapeSequences';
+import { IKeyboardEvent, IKeyboardResult, KeyboardResultType } from '../Types';
+import { C0 } from '../data/EscapeSequences';
 
 /**
  * Win32 control key state flags (from Windows API).

src/common/input/WriteBuffer.ts

@@ -4,9 +4,9 @@
  * @license MIT
  */
 
-import { TimeoutTimer } from 'common/Async';
-import { Disposable, toDisposable } from 'common/Lifecycle';
-import { Emitter } from 'common/Event';
+import { TimeoutTimer } from '../Async';
+import { Disposable, toDisposable } from '../Lifecycle';
+import { Emitter } from '../Event';
 
 const enum Constants {
   /**

src/common/input/XParseColor.test.ts

@@ -4,7 +4,7 @@
  */
 
 import { assert } from 'chai';
-import { parseColor, toRgbString } from 'common/input/XParseColor';
+import { parseColor, toRgbString } from './XParseColor';
 
 describe('XParseColor', () => {
   describe('parseColor', () => {