feat: add find message action in Slack

packages/backend/src/apps/slack/info.json

@@ -204,6 +204,73 @@
           "name": "Test action"
         }
       ]
+    },
+    {
+      "name": "Find message",
+      "key": "findMessage",
+      "description": "Find a Slack message using the Slack Search feature.",
+      "substeps": [
+        {
+          "key": "chooseConnection",
+          "name": "Choose connection"
+        },
+        {
+          "key": "setupAction",
+          "name": "Set up action",
+          "arguments": [
+            {
+              "label": "Search Query",
+              "key": "query",
+              "type": "string",
+              "required": true,
+              "description": "Search query to use for finding matching messages. See the Slack Search Documentation for more information on constructing a query.",
+              "variables": true
+            },
+            {
+              "label": "Sort by",
+              "key": "sortBy",
+              "type": "dropdown",
+              "description": "Sort messages by their match strength or by their date. Default is score.",
+              "required": true,
+              "value": "score",
+              "variables": false,
+              "options": [
+                {
+                  "label": "Match strength",
+                  "value": "score"
+                },
+                {
+                  "label": "Message date time",
+                  "value": "timestamp"
+                }
+              ]
+            },
+            {
+              "label": "Sort direction",
+              "key": "sortDirection",
+              "type": "dropdown",
+              "description": "Sort matching messages in ascending or descending order. Default is descending.",
+              "required": true,
+              "value": "desc",
+              "variables": false,
+              "options": [
+                {
+                  "label": "Descending (newest or best match first)",
+                  "value": "desc"
+                },
+                {
+                  "label": "Ascending (oldest or worst match first)",
+                  "value": "asc"
+                }
+              ]
+            }
+          ]
+        },
+        {
+          "key": "testStep",
+          "name": "Test action"
+        }
+      ]
     }
   ]
 }