added instructions on how to install CC3D

Author: maciekswat

docs/releases/4.8.0.md

@@ -118,3 +118,126 @@ We have overhauled how you capture your simulations:
     parameter handling.
 -   Fixed folder access and file handling bugs during long-running
     operations.
+
+# 🚀 How to Install
+
+## Option 1: Conda / Mamba (Recommended)
+
+### 🔹 Quick install (existing environment)
+
+```bash
+mamba install -c compucell3d -c conda-forge compucell3d=4.8.0
+```
+
+Launch Player:
+
+```bash
+python -m cc3d.player5
+```
+
+---
+
+### 🔹 Recommended clean installation (best stability)
+
+```bash
+conda create -n cc3d_480 python=3.12 -c conda-forge
+conda activate cc3d_480
+conda install -c conda-forge mamba
+mamba install -c conda-forge -c compucell3d compucell3d=4.8.0
+```
+
+👉 On Windows, you may also run:
+
+```bash
+set PYTHONIOENCODING=utf-8
+```
+
+---
+
+### ⚠️ Notes
+
+- Use **conda-forge + compucell3d channels only**
+- Avoid `main` channel to prevent conflicts
+- `mamba` is strongly recommended
+
+---
+
+## Option 2: Binary Downloads
+
+👉 https://sourceforge.net/projects/cc3d/files/
+
+---
+
+### 🪟 Windows
+
+- Choose appropriate installer (.exe)
+- If GPU issues occur → use no-GPU installer
+
+If CC3D fails after upgrade:
+- Remove old installation directory
+- Remove `_settings.sqlite` if needed
+
+---
+
+### 🍎 macOS
+
+Before installing:
+```bash
+rm -rf ~/CompuCell3D
+```
+
+#### Apple Silicon (M1/M2/M3)
+
+```bash
+chmod +x cc3d-installer-osx-4.8.0-arm64.sh
+./cc3d-installer-osx-4.8.0-arm64.sh
+```
+
+#### Intel Macs
+
+Binaries coming soon.
+
+---
+
+### 🐧 Linux
+
+```bash
+chmod +x cc3d-installer-linux-4.8.0-x86-64bit.sh
+./cc3d-installer-linux-4.8.0-x86-64bit.sh
+```
+
+Install location:
+~/CompuCell3D
+
+---
+
+# ▶️ Running CompuCell3D
+
+Player:
+```bash
+python -m cc3d.player5
+```
+
+Twedit++:
+```bash
+python -m cc3d.twedit5
+```
+
+Headless:
+```bash
+python -m cc3d.run_script
+```
+
+---
+
+# 📦 Optional: Install Demos
+
+Download from:
+https://github.com/CompuCell3D/CompuCell3D/tree/master/CompuCell3D/core/Demos
+
+Place in:
+~/CompuCell3D/Demos
+
+---
+
+