docs(readme): update quick start section to emphasize recommended setup methods over pip

Author: Tcode-Motion

README.md

@@ -117,11 +117,17 @@ graph TD
 
 Get from zero to running a project in under 30 seconds:
 
-1. **Install the Toolchain** via pip:
-   ```bash
-   pip install techscript
-   techscript install
-   ```
+1. **Install the Toolchain**:
+   * **Linux / macOS / Termux (Recommended)**:
+     ```bash
+     curl -fsSL https://raw.githubusercontent.com/Tcode-Motion/techscript/main/scripts/install.sh | bash
+     ```
+   * **Windows (Recommended)**: Download and run **`TechScript_Setup.exe`** from [GitHub Releases](https://github.com/Tcode-Motion/techscript/releases).
+   * **Python pip (Not Recommended)**:
+     ```bash
+     pip install techscript
+     techscript install
+     ```
 2. **Scaffold a Project**:
    ```bash
    tsc new hello_world