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.

web/src/types/dex.ts

@@ -0,0 +1,108 @@
+export interface TokenInfo {
+  id: number;
+  symbol: string;
+  name: string;
+  decimals: number;
+  logo?: string;
+}
+
+export interface PoolInfo {
+  id: string; // asset1-asset2 pair
+  asset1: number;
+  asset2: number;
+  asset1Symbol: string;
+  asset2Symbol: string;
+  asset1Decimals: number;
+  asset2Decimals: number;
+  reserve1: string; // Raw balance string
+  reserve2: string;
+  lpTokenSupply: string;
+  volume24h?: string;
+  tvl?: string;
+  apr7d?: string;
+  feeRate?: string;
+}
+
+export interface UserLiquidityPosition {
+  poolId: string;
+  asset1: number;
+  asset2: number;
+  lpTokenBalance: string;
+  shareOfPool: string; // Percentage as string (e.g., "2.5")
+  asset1Amount: string;
+  asset2Amount: string;
+  valueUSD?: string;
+  feesEarned?: string;
+}
+
+export interface SwapQuote {
+  amountIn: string;
+  amountOut: string;
+  path: number[]; // Asset IDs in route
+  priceImpact: string; // Percentage as string
+  minimumReceived: string; // After slippage
+  route: string; // Human readable (e.g., "wHEZ → PEZ → wUSDT")
+}
+
+export interface AddLiquidityParams {
+  asset1: number;
+  asset2: number;
+  amount1: string;
+  amount2: string;
+  amount1Min: string;
+  amount2Min: string;
+  recipient: string;
+}
+
+export interface RemoveLiquidityParams {
+  asset1: number;
+  asset2: number;
+  lpTokenAmount: string;
+  amount1Min: string;
+  amount2Min: string;
+  recipient: string;
+}
+
+export interface SwapParams {
+  path: number[];
+  amountIn: string;
+  amountOutMin: string;
+  recipient: string;
+  deadline?: number;
+}
+
+export interface PoolCreationParams {
+  asset1: number;
+  asset2: number;
+  feeRate?: number;
+}
+
+// Known tokens on testnet
+export const KNOWN_TOKENS: Record<number, TokenInfo> = {
+  0: {
+    id: 0,
+    symbol: 'wHEZ',
+    name: 'Wrapped HEZ',
+    decimals: 12,
+  },
+  1: {
+    id: 1,
+    symbol: 'PEZ',
+    name: 'Pezkuwi Token',
+    decimals: 12,
+  },
+  2: {
+    id: 2,
+    symbol: 'wUSDT',
+    name: 'Wrapped USDT',
+    decimals: 6,
+  },
+};
+
+// Transaction status
+export enum TransactionStatus {
+  IDLE = 'idle',
+  PENDING = 'pending',
+  SUCCESS = 'success',
+  ERROR = 'error',
+}