chore: remove mobile/ from monorepo, suspend CI mobile job

* chore: update exchange submodule to pex.network release + add shared images

Exchange submodule advanced to include:
- sweeper.js: TRC-20 JWT Bearer auth, DOT transferAll, PEZ-AH pre-fund
- docker-compose.yml: pex.network defaults for VITE_API_BASE_URL and SMTP_FROM
- .github/workflows/build-deploy.yml: pex.network build arg for web service

Shared images added: keziyakurd, kiwi_perwerde, kurdistan_assembly, pezkuwi, satoshi_qazi_muh

* chore: remove mobile/ from monorepo, suspend CI mobile job

Mobile app moved to /home/mamostehp/pwap-mobile (local, suspended).
Will be re-integrated when mobile development resumes.

- Removed mobile/ directory entirely
- Removed Mobile App job from quality-gate.yml so CI no longer blocks

mobile/__tests__/App.test.tsx

@@ -1,20 +0,0 @@
-import React from 'react';
-import { Text } from 'react-native';
-
-// Simplified integration test that doesn't import the full App
-// This avoids complex dependency chains during testing
-
-describe('App Integration Tests', () => {
-  it('should have a passing test', () => {
-    expect(true).toBe(true);
-  });
-
-  it('should be able to create React components', () => {
-    const TestComponent = () => <Text>Test</Text>;
-    expect(TestComponent).toBeDefined();
-  });
-
-  it('should have React Native available', () => {
-    expect(Text).toBeDefined();
-  });
-});