Add FileManager (#6051)

repository/f.json

@@ -507,6 +507,17 @@
 				}
 			]
 		},
+		{
+			"name": "FileManager",
+			"details": "https://github.com/math2001/FileManager",
+			"labels": ["sidebar", "folder", "file", "clipboard", "terminal", "file creation", "file navigation"],
+			"releases": [
+				{
+					"sublime_text": ">=3000",
+					"tags": true
+				}
+			]
+		},
 		{
 			"name": "FileMerge",
 			"details": "https://github.com/thtliife/FileMerge",