Update tutorials and Readme with optional dependencies

Author: EwoutH

README.md

@@ -30,25 +30,38 @@ can be displayed in browser windows or Jupyter.*
 
 To install our latest stable release (2.3.x), run:
 
-``` bash
+```bash
 pip install -U mesa
 ```
 
 To install our latest pre-release (3.0.0 alpha), run:
 
-``` bash
+```bash
 pip install -U --pre mesa
 ```
+With Mesa 3.0, we don't install all our dependencies anymore by default.
+```bash
+# With our recommended dependencies
+pip install -U --pre mesa[rec]
+```
+```bash
+# You can customize the dependencies you need, if you want. Available are:
+pip install -U --pre mesa[network,viz,data,batch]
+```
+```bash
+# With all, including developer, dependencies:
+pip install -U --pre mesa[all]
+```
 
 You can also use `pip` to install the latest GitHub version:
 
-``` bash
+```bash
 pip install -U -e git+https://github.com/projectmesa/mesa@main#egg=mesa
 ```
 
 Or any other (development) branch on this repo or your own fork:
 
-``` bash
+```bash
 pip install -U -e git+https://github.com/YOUR_FORK/mesa@YOUR_BRANCH#egg=mesa
 ```
 
@@ -75,7 +88,7 @@ If you are a Mesa developer, first [install Docker
 Compose](https://docs.docker.com/compose/install/) and then, in the
 folder containing the Mesa Git repository, you run:
 
-``` bash
+```bash
 $ docker compose up
 # If you want to make it run in the background, you instead run
 $ docker compose up -d

docs/tutorials/intro_tutorial.ipynb

@@ -60,7 +60,13 @@
     "\n",
     "Create and activate a [virtual environment](http://docs.python-guide.org/en/latest/dev/virtualenvs/). *Python version 3.10 or higher is required*.\n",
     "\n",
-    "Install Mesa:\n",
+    "Install Mesa with the recommended dependencies.\n",
+    "\n",
+    "```bash\n",
+    "pip install --upgrade mesa[rec]\n",
+    "```\n",
+    "\n",
+    "If you already have all the dependencies installed or are just updating, you can install Mesa without the recommended dependencies:\n",
     "\n",
     "```bash\n",
     "pip install --upgrade mesa\n",
@@ -69,7 +75,7 @@
     "If you want to use our newest features, you can also opt to install our latest pre-release version:\n",
     "\n",
     "```bash\n",
-    "pip install --upgrade --pre mesa\n",
+    "pip install --upgrade --pre mesa[rec]\n",
     "```\n",
     "\n",
     "Install Jupyter Notebook (optional):\n",
@@ -96,7 +102,7 @@
    "source": [
     "# SKIP THIS CELL unless running in colab\n",
     "\n",
-    "%pip install --quiet mesa\n",
+    "%pip install --quiet mesa[rec]\n",
     "# The exclamation points tell jupyter to do the command via the command line"
    ]
   },

docs/tutorials/visualization_tutorial.ipynb

@@ -41,8 +41,8 @@
    },
    "outputs": [],
    "source": [
-    "# Install and import the latest Mesa pre-release version\n",
-    "%pip install --quiet --upgrade --pre mesa\n",
+    "# Install and import the latest Mesa pre-release version with the recommended dependencies\n",
+    "%pip install --quiet --upgrade --pre mesa[rec]\n",
     "import mesa\n",
     "print(f\"Mesa version: {mesa.__version__}\")\n",
     "\n",