add inquirer lib and unit test for handlers

.eslintrc.cjs

fakeWallet.json

index.ts

package-lock.json

package.json

realWallet.json

src/handlers/handlers.ts

src/handlers/roleHandlers.ts

src/services/contract.service.ts

src/utils/askQuestion.ts

test/handlers/handlers.spec.ts

test/handlers/roleHandlers.spec.ts

test/services/balance.service.spec.ts

test/services/token.service.spec.ts