Resolve pending TODOs for DEX Core v.1.0.0

[emiliolisk]

Description

This task will resolve the pending TODOs in the codebase: https://github.com/LiskHQ/lisk-dex-core/search?q=todo&type=code.

• Resolve all pending TODOs.
  • Timestamp checks on verify blocks of the following DEX commands:
    • addLiquidity
    • createPool
    • createPosition
    • removeLiquidity
    • swapExactIn
    • swapExactOut
    • swapWithPriceLimit
  • Add FeeMethod to DEX Commands
  • Replace legacy token transfer function for fees transferToProtocolFeeAccount with FeeMethod.payFee
  • Replace legacy token transfer function for fees transferToValidatorLSKPool with FeeMethod.payFee
  • Fix swapWithin on DEX swapFunctions.ts: use a valid totalIncentives value instead of 0.
• Add tests and updated existing ones.
• Update est config (we were using a deprecated format)
• Update .gitignore.

Acceptance Criteria

• All pending TODOs are resolved.
• Unit tests were added and updated in the test/unit/modules/dex folder.
• All tests are passing.