docs: add Windows installation instructions to all READMEs

- What: Added Windows quick install section with direct download link to zip file
- What: Updated README.md, README.zh-TW.md, README.zh-CN.md, README.ja.md
- Why: Windows users can now easily find and download the pre-built executable

Tests: N/A (documentation only).

Author: DennySORA

README.md

@@ -20,10 +20,9 @@
 curl -fsSL https://raw.githubusercontent.com/DennySORA/httpulse/main/install.sh | bash
 ```
 
-**Or with wget:**
-```bash
-wget -qO- https://raw.githubusercontent.com/DennySORA/httpulse/main/install.sh | bash
-```
+**Windows:**
+
+Download [`httpulse-x86_64-pc-windows-msvc.zip`](https://github.com/DennySORA/httpulse/releases/latest/download/httpulse-x86_64-pc-windows-msvc.zip), extract, and run `httpulse.exe`.
 
 See [Installation](#installation) for more options.
 

docs/README.ja.md

@@ -20,10 +20,9 @@
 curl -fsSL https://raw.githubusercontent.com/DennySORA/httpulse/main/install.sh | bash
 ```
 
-**wget を使用：**
-```bash
-wget -qO- https://raw.githubusercontent.com/DennySORA/httpulse/main/install.sh | bash
-```
+**Windows：**
+
+[`httpulse-x86_64-pc-windows-msvc.zip`](https://github.com/DennySORA/httpulse/releases/latest/download/httpulse-x86_64-pc-windows-msvc.zip) をダウンロードし、解凍して `httpulse.exe` を実行してください。
 
 詳細は [インストール](#インストール) セクションを参照してください。
 

docs/README.zh-CN.md

@@ -20,10 +20,9 @@
 curl -fsSL https://raw.githubusercontent.com/DennySORA/httpulse/main/install.sh | bash
 ```
 
-**使用 wget：**
-```bash
-wget -qO- https://raw.githubusercontent.com/DennySORA/httpulse/main/install.sh | bash
-```
+**Windows：**
+
+下载 [`httpulse-x86_64-pc-windows-msvc.zip`](https://github.com/DennySORA/httpulse/releases/latest/download/httpulse-x86_64-pc-windows-msvc.zip)，解压后运行 `httpulse.exe`。
 
 详见 [安装](#安装) 章节。
 

docs/README.zh-TW.md

@@ -20,10 +20,9 @@
 curl -fsSL https://raw.githubusercontent.com/DennySORA/httpulse/main/install.sh | bash
 ```
 
-**使用 wget：**
-```bash
-wget -qO- https://raw.githubusercontent.com/DennySORA/httpulse/main/install.sh | bash
-```
+**Windows：**
+
+下載 [`httpulse-x86_64-pc-windows-msvc.zip`](https://github.com/DennySORA/httpulse/releases/latest/download/httpulse-x86_64-pc-windows-msvc.zip)，解壓縮後執行 `httpulse.exe`。
 
 詳見 [安裝](#安裝) 章節。