Organize shared code across web, mobile, and SDK UI projects

Centralized common code into shared/ folder to eliminate duplication and
improve maintainability across all three frontend projects (web, mobile,
pezkuwi-sdk-ui).

Changes:
- Added token types and constants to shared/types/tokens.ts
  - TokenInfo, PoolInfo, SwapQuote, and other DEX types
  - KNOWN_TOKENS with HEZ, PEZ, wUSDT definitions
  - Token logos (🟡🟣💵)

- Added Kurdistan color palette to shared/constants/
  - Kesk, Sor, Zer, Spî, Reş color definitions

- Added TOKEN_DISPLAY_SYMBOLS mapping (USDT vs wUSDT)

- Updated blockchain configuration in shared/blockchain/polkadot.ts
  - Added beta testnet endpoint (wss://beta-rpc.pezkuwi.art)
  - Defined DEFAULT_ENDPOINT constant

- Moved i18n to shared/i18n/
  - Centralized translation files for 6 languages (EN, TR, KMR, CKB, AR, FA)
  - Added LANGUAGES configuration with RTL support
  - Created isRTL() helper function

- Updated web and mobile to import from shared
  - web/src/types/dex.ts now re-exports from shared
  - web/src/contexts/PolkadotContext.tsx uses DEFAULT_ENDPOINT
  - mobile/src/i18n/index.ts uses shared translations
  - mobile/src/contexts/PolkadotContext.tsx uses DEFAULT_ENDPOINT

- Updated shared/README.md with comprehensive documentation

This architecture reduces code duplication and ensures consistency across
all frontend projects.

shared/i18n/locales/kmr.json

@@ -0,0 +1,64 @@
+{
+  "welcome": {
+    "title": "Bi xêr hatî Pezkuwî",
+    "subtitle": "Deriyê te yê bo rêveberiya desentralîze",
+    "selectLanguage": "Zimanê Xwe Hilbijêre",
+    "continue": "Bidomîne"
+  },
+  "auth": {
+    "signIn": "Têkeve",
+    "signUp": "Tomar bibe",
+    "email": "E-posta",
+    "password": "Şîfre",
+    "confirmPassword": "Şîfreyê Bipejirîne",
+    "forgotPassword": "Şîfreyê te ji bîr kiriye?",
+    "noAccount": "Hesabê te tune ye?",
+    "haveAccount": "Jixwe hesabê te heye?",
+    "createAccount": "Hesab Biafirîne",
+    "welcomeBack": "Dîsa bi xêr hatî!",
+    "getStarted": "Dest pê bike"
+  },
+  "dashboard": {
+    "title": "Serûpel",
+    "wallet": "Berîk",
+    "staking": "Staking",
+    "governance": "Rêvebir",
+    "dex": "Guherîn",
+    "history": "Dîrok",
+    "settings": "Mîheng",
+    "balance": "Bilanço",
+    "totalStaked": "Hemû Stake",
+    "rewards": "Xelat",
+    "activeProposals": "Pêşniyarên Çalak"
+  },
+  "wallet": {
+    "title": "Berîk",
+    "connect": "Berîkê Girêde",
+    "disconnect": "Girêdanê Rake",
+    "address": "Navnîşan",
+    "balance": "Bilanço",
+    "send": "Bişîne",
+    "receive": "Bistîne",
+    "transaction": "Ragihandin",
+    "history": "Dîrok"
+  },
+  "settings": {
+    "title": "Mîheng",
+    "language": "Ziman",
+    "theme": "Tema",
+    "notifications": "Agahdarî",
+    "security": "Ewlekarî",
+    "about": "Derbarê",
+    "logout": "Derkeve"
+  },
+  "common": {
+    "cancel": "Betal bike",
+    "confirm": "Bipejirîne",
+    "save": "Tomar bike",
+    "loading": "Tê barkirin...",
+    "error": "Çewtî",
+    "success": "Serkeftin",
+    "retry": "Dîsa biceribîne",
+    "close": "Bigire"
+  }
+}