add .rpm packaging: CI rpmbuild, download card + install command, rpm asset

web/download.php

@@ -15,6 +15,9 @@ pmm_page_open('DOWNLOAD', '下载 PMM');
       <a class="dl-card" href="downloads/pmm_<?php echo PMM_VERSION; ?>_amd64.deb" download>
         <span class="dl-os">Linux</span><span class="dl-file">pmm_<?php echo PMM_VERSION; ?>_amd64.deb</span><span class="dl-arrow">↓</span>
       </a>
+      <a class="dl-card" href="downloads/pmm-<?php echo PMM_VERSION; ?>.x86_64.rpm" download>
+        <span class="dl-os">Linux</span><span class="dl-file">pmm-<?php echo PMM_VERSION; ?>.x86_64.rpm</span><span class="dl-arrow">↓</span>
+      </a>
       <a class="dl-card" href="install.sh" download>
         <span class="dl-os">Linux/macOS</span><span class="dl-file">install.sh · 一键安装</span><span class="dl-arrow">↓</span>
       </a>

web/install.php

@@ -27,6 +27,10 @@ curl -sSL https://pmm.parlz.com/install.sh | bash
 # 方式二：.deb 安装
 curl -L -o pmm.deb https://pmm.parlz.com/downloads/pmm_<?php echo PMM_VERSION; ?>_amd64.deb
 sudo apt install ./pmm.deb
+
+# 方式三：.rpm 安装
+curl -L -o pmm.rpm https://pmm.parlz.com/downloads/pmm-<?php echo PMM_VERSION; ?>.x86_64.rpm
+sudo rpm -Uvh pmm.rpm
 pmm -v</code></pre>
       <button class="copy-btn" data-copy="linux">复制</button>
     </div>