Some quick things after first pairing session with Iryna

.gitignore

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+./vendor/*

README.md

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-# tic-tac-toe-kata
-DDD modeling kata for Tic Tac Toe
+# Rules:
+
+- The game is played on a 3x3 grid.
+- One player is assigned X, another is assigned O.
+- Players take turns placing marks on empty spaces on the grid until an end condition is met.
+- End condition 1: 3 of one player's marks line up orthogonally or diagonally making them the winner
+- All spaces are filled: in which nobody is the winner.
+

composer.json

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+{
+    "name": "andrew.cairns/tictactoe",
+    "require-dev": {
+        "phpunit/phpunit": "^10.4"
+    },
+    "autoload": {
+        "psr-4": {
+            "AndrewCairns\\Tictactoe\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\AndrewCairns\\Tictactoe\\": "tests/"
+        }
+    },
+    "authors": [
+        {
+            "name": "Andrew Cairns",
+            "email": "[email protected]"
+        }
+    ],
+    "require": {}
+}