docs: prioritize universal install script as primary installation method

- Make curl https://vapi.ai/install.sh the recommended installation method
- Reorganize other methods as alternatives under Package Managers
- Update release template to match new installation priority

Author: goosewin

.goreleaser.yaml

@@ -84,30 +84,30 @@ release:
     
     ### Installation
     
-    #### npm (Cross-platform)
+    #### Universal Install Script (Recommended)
     ```bash
-    npm install -g @vapi-ai/cli
+    curl -sSL https://vapi.ai/install.sh | bash
     ```
     
-    #### Homebrew (macOS/Linux)
+    #### Package Managers
     ```bash
+    # npm
+    npm install -g @vapi-ai/cli
+    
+    # Homebrew (macOS/Linux)
     brew tap vapi/tap && brew install vapi-cli
-    ```
     
-    #### Scoop (Windows)
-    ```powershell
-    scoop bucket add vapi https://github.com/VapiAI/scoop-bucket
-    scoop install vapi-cli
+    # Scoop (Windows)  
+    scoop bucket add vapi https://github.com/VapiAI/scoop-bucket && scoop install vapi-cli
     ```
     
     #### Docker
     ```bash
     docker run -it ghcr.io/vapiai/cli:latest --help
     ```
     
-    #### Direct Download
+    #### Manual Download
     ```bash
-    # macOS/Linux
     curl -sSL https://github.com/VapiAI/cli/releases/download/v{{.Version}}/cli_$(uname -s)_$(uname -m).tar.gz | tar xz
     sudo mv vapi /usr/local/bin
     ```

README.md

@@ -23,20 +23,30 @@ The official command-line interface for [Vapi](https://vapi.ai) - Voice AI for d
 
 ## Installation
 
-### npm (Cross-platform)
+### Universal Install Script (Recommended)
+
+```bash
+curl -sSL https://vapi.ai/install.sh | bash
+```
+
+This script automatically detects your platform and installs the latest version.
+
+### Package Managers
+
+#### npm (Cross-platform)
 
 ```bash
 npm install -g @vapi-ai/cli
 ```
 
-### Homebrew (macOS/Linux)
+#### Homebrew (macOS/Linux)
 
 ```bash
 brew tap vapi/tap
 brew install vapi-cli
 ```
 
-### Scoop (Windows)
+#### Scoop (Windows)
 
 ```powershell
 scoop bucket add vapi https://github.com/VapiAI/scoop-bucket
@@ -53,7 +63,7 @@ docker run -it ghcr.io/vapiai/cli:latest --help
 docker run -it -v ~/.vapi-cli.yaml:/home/vapi/.vapi-cli.yaml ghcr.io/vapiai/cli:latest assistant list
 ```
 
-### Direct Download
+### Manual Download
 
 Download pre-built binaries from [GitHub Releases](https://github.com/VapiAI/cli/releases):