begin writing the first tutorial

Author: djmarques

docs/source/opening_files.ipynb docs/source/tutorial_1.ipynbdocs/source/opening_files.ipynb renamed to docs/source/tutorial_1.ipynb

@@ -4,16 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Introduction to pyActigraphy"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "**Original Author:** Grégory Hammad\n",
-    "\n",
-    "**Note:** *This is a legacy tutorial originally developed for `pyActigraphy`. It remains useful for reference, but will be updated following the release of the first milestone version of the `circStudio` package.*"
+    "# Opening files using circStudio"
    ]
   },
   {
@@ -39,8 +30,8 @@
    "execution_count": 1,
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2025-07-18T15:06:26.427192Z",
-     "start_time": "2025-07-18T15:06:23.254057Z"
+     "end_time": "2025-07-19T03:31:42.915586Z",
+     "start_time": "2025-07-19T03:31:39.471068Z"
     }
    },
    "outputs": [],