refactor: import config surface from autogalaxy instead of autoconf

Rewrite `from autoconf[.sub] import X` to `from autogalaxy import X` across scripts,
notebooks and markdown, so workspace code imports the config/serialization
surface (conf, jax_wrapper, with_test_mode_segment, dictable/fitsable helpers,
etc.) through the science library rather than depending on `autoconf` directly.

The Colab bootstrap `from autoconf import setup_colab` is intentionally left on
autoconf: it runs before the library is pip-installed on Colab. Notebooks were
updated by the same deterministic line-level transform as the scripts (the
catalogue files embed no import lines and are unaffected).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013ciVftxvYpefh59wSkR7jN

Author: claude

markdown/chapter_1_introduction/tutorial_0_visualization.md

@@ -62,7 +62,7 @@
    "metadata": {},
    "source": [
     "\n",
-    "from autoconf import setup_notebook; setup_notebook()"
+    "from autogalaxy import setup_notebook; setup_notebook()"
    ],
    "outputs": [],
    "execution_count": null

markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies.md

@@ -90,7 +90,7 @@
    "metadata": {},
    "source": [
     "\n",
-    "from autoconf import setup_notebook; setup_notebook()\n",
+    "from autogalaxy import setup_notebook; setup_notebook()\n",
     "\n",
     "import matplotlib.pyplot as plt\n",
     "import numpy as np\n",

markdown/chapter_1_introduction/tutorial_2_data.md

@@ -76,7 +76,7 @@
    "metadata": {},
    "source": [
     "\n",
-    "from autoconf import setup_notebook; setup_notebook()\n",
+    "from autogalaxy import setup_notebook; setup_notebook()\n",
     "\n",
     "import numpy as np\n",
     "from pathlib import Path\n",

markdown/chapter_1_introduction/tutorial_3_fitting.md

@@ -77,7 +77,7 @@
    "metadata": {},
    "source": [
     "\n",
-    "from autoconf import setup_notebook; setup_notebook()\n",
+    "from autogalaxy import setup_notebook; setup_notebook()\n",
     "\n",
     "import numpy as np\n",
     "from pathlib import Path\n",

markdown/chapter_1_introduction/tutorial_5_summary.md

@@ -62,9 +62,9 @@
    "metadata": {},
    "source": [
     "\n",
-    "from autoconf import jax_wrapper  # Sets JAX environment before other imports\n",
+    "from autogalaxy import jax_wrapper  # Sets JAX environment before other imports\n",
     "\n",
-    "from autoconf import setup_notebook; setup_notebook()\n",
+    "from autogalaxy import setup_notebook; setup_notebook()\n",
     "\n",
     "import autogalaxy as ag\n",
     "import autogalaxy.plot as aplt"