docs: update brew formula stuff to recommend our tap

Author: rekram1-node

README.md

@@ -28,7 +28,8 @@ curl -fsSL https://opencode.ai/install | bash
 npm i -g opencode-ai@latest        # or bun/pnpm/yarn
 scoop bucket add extras; scoop install extras/opencode  # Windows
 choco install opencode             # Windows
-brew install opencode              # macOS and Linux
+brew install anomalyco/tap/opencode # macOS and Linux (recommended, always up to date)
+brew install opencode              # macOS and Linux (official brew formula, updated less frequently)
 paru -S opencode-bin               # Arch Linux
 mise use -g opencode               # Any OS
 nix run nixpkgs#opencode           # or github:anomalyco/opencode for latest dev branch

README.zh-CN.md

@@ -28,7 +28,8 @@ curl -fsSL https://opencode.ai/install | bash
 npm i -g opencode-ai@latest        # 也可使用 bun/pnpm/yarn
 scoop bucket add extras; scoop install extras/opencode  # Windows
 choco install opencode             # Windows
-brew install opencode              # macOS 和 Linux
+brew install anomalyco/tap/opencode # macOS 和 Linux（推荐，始终保持最新）
+brew install opencode              # macOS 和 Linux（官方 brew formula，更新频率较低）
 paru -S opencode-bin               # Arch Linux
 mise use -g opencode               # 任意系统
 nix run nixpkgs#opencode           # 或用 github:anomalyco/opencode 获取最新 dev 分支

README.zh-TW.md

@@ -28,7 +28,8 @@ curl -fsSL https://opencode.ai/install | bash
 npm i -g opencode-ai@latest        # 也可使用 bun/pnpm/yarn
 scoop bucket add extras; scoop install extras/opencode  # Windows
 choco install opencode             # Windows
-brew install opencode              # macOS 與 Linux
+brew install anomalyco/tap/opencode # macOS 與 Linux（推薦，始終保持最新）
+brew install opencode              # macOS 與 Linux（官方 brew formula，更新頻率較低）
 paru -S opencode-bin               # Arch Linux
 mise use -g github:anomalyco/opencode    # 任何作業系統
 nix run nixpkgs#opencode           # 或使用 github:anomalyco/opencode 以取得最新開發分支

packages/web/src/content/docs/index.mdx

@@ -76,9 +76,11 @@ You can also install it with the following commands:
 - **Using Homebrew on macOS and Linux**
 
   ```bash
-  brew install opencode
+  brew install anomalyco/tap/opencode
   ```
 
+  > We recommend using the OpenCode tap for the most up to date releases. The official `brew install opencode` formula is maintained by the Homebrew team and is updated less frequently.
+
 - **Using Paru on Arch Linux**
 
   ```bash