Reorganize repository into monorepo structure

Restructured the project to support multiple frontend applications:
- Move web app to web/ directory
- Create pezkuwi-sdk-ui/ for Polkadot SDK clone (planned)
- Create mobile/ directory for mobile app development
- Add shared/ directory with common utilities, types, and blockchain code
- Update README.md with comprehensive documentation
- Remove obsolete DKSweb/ directory

This monorepo structure enables better code sharing and organized
development across web, mobile, and SDK UI projects.

shared/types/blockchain.ts

@@ -0,0 +1,26 @@
+/**
+ * Blockchain-related type definitions
+ */
+
+export interface WalletAccount {
+  address: string;
+  name?: string;
+  source?: string;
+}
+
+export interface BlockchainNetwork {
+  name: string;
+  endpoint: string;
+  chainId?: string;
+}
+
+export interface Transaction {
+  hash: string;
+  from: string;
+  to: string;
+  amount: string;
+  timestamp: number;
+  status: 'pending' | 'success' | 'failed';
+}
+
+// Add more blockchain types as needed

shared/types/index.ts

@@ -0,0 +1,11 @@
+/**
+ * Shared TypeScript types for Pezkuwi Web App Projects
+ *
+ * This file contains common type definitions used across
+ * web and mobile applications.
+ */
+
+// Export blockchain-related types here
+export * from './blockchain';
+
+// Add more type exports as needed