chore: rename Evidence to Post

since Evidence in ArbitratorV2 is to be
handled at arbitrator anyway, the threads
meant for internal consumption in stake
curate will be known as Posts to avoid confusion

contracts/contracts/StakeCurate.sol

@@ -11,7 +11,7 @@ pragma solidity ^0.8;
 import "./interfaces/IArbitrable.sol";
 import "./interfaces/IArbitrator.sol";
 import "./interfaces/IMetaEvidence.sol";
-import "./interfaces/ISimpleEvidence.sol";
+import "./interfaces/IPost.sol";
 import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 import "./Cint32.sol";
 
@@ -22,7 +22,7 @@ import "./Cint32.sol";
  * @dev The stakes of the items are handled here. Handling arbitrary on-chain data is
  * possible, but many curation needs can be solved by keeping off-chain state availability.
  */
-contract StakeCurate is IArbitrable, IMetaEvidence, ISimpleEvidence {
+contract StakeCurate is IArbitrable, IMetaEvidence, IPost {
 
   enum Party { Staker, Challenger }
   enum DisputeState { Free, Used }
@@ -887,16 +887,16 @@ contract StakeCurate is IArbitrable, IMetaEvidence, ISimpleEvidence {
   }
 
   /**
-   * @dev Submits evidence to an item. Evidence can be emitted at any time.
+   * @dev Submits post on an item. Posts can be emitted at any time.
    *  Item existence is not checked, since quality filtering would be done externally.
-   *  For example, if the item did not exist at the time the Evidence was emitted, then
+   *  For example, if the item did not exist at the time the Post was emitted, then
    *  it could be hidden.
    *  Assume this function will be the subject of spam and flood.
    * @param _itemId Id of the item to submit evidence to.
-   * @param _evidence IPFS uri linking to the evidence.
+   * @param _post IPFS uri linking to the post.
    */
-  function submitEvidence(uint56 _itemId, string calldata _evidence) external {
-    emit Evidence(_itemId, _evidence);
+  function submitPost(uint56 _itemId, string calldata _post) external {
+    emit Post(_itemId, _post);
   }
 
   /**

contracts/contracts/interfaces/IPost.sol

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import "./IArbitrator.sol";
+
+/** @title IPost
+ *  Inspired in ERC-1497: Evidence Standard
+ */
+interface IPost {
+    /**
+     * @dev To be raised when post is submitted. Should point to the resource.
+     * @param _threadId Unique identifier of the thread the post belongs to.
+     * @param _post IPFS path to post, example: '/ipfs/Qmarwkf7C9RuzDEJNnarT3WZ7kem5bk8DZAzx78acJjMFH/evidence.json'
+     */
+    event Post(uint256 indexed _threadId, string _post);
+}