interface: add Pool and addresses provider getters on interface

Author: sakulstra

src/contracts/extensions/stata-token/interfaces/IERC4626StataToken.sol

@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.10;
 
+import {IPool, IPoolAddressesProvider} from '../../../interfaces/IPool.sol';
+
 interface IERC4626StataToken {
   struct SignatureParams {
     uint8 v;
@@ -14,6 +16,18 @@ interface IERC4626StataToken {
 
   error OnlyPauseGuardian(address caller);
 
+  /**
+   * @notice The pool associated with the aToken.
+   * @return The pool address.
+   */
+  function POOL() external view returns (IPool);
+
+  /**
+   * @notice The poolAddressesProvider associated with the pool.
+   * @return The poolAddressesProvider address.
+   */
+  function POOL_ADDRESSES_PROVIDER() external view returns (IPoolAddressesProvider);
+
   /**
    * @notice Burns `shares` of static aToken, with receiver receiving the corresponding amount of aToken
    * @param shares The shares to withdraw, in static balance of StaticAToken