Add brand colors for volcengine, huawei, google, azure, and oracle providers

[Copilot]

The providerColorMap was missing entries for volcengine and other major cloud providers, causing them to render in default gray (#64748b).

Changes

Added color mappings for 5 providers using their official brand colors:

const providerColorMap = {
    aliyun: '#ff6a00',
    alibaba: '#ff6a00',
    tencent: '#0052d9',
    aws: '#ff9900',
    vultr: '#007bfc',
    volcengine: '#1764ff',      // Bytedance blue
    huawei: '#C8102E',          // Huawei red
    huaweicloud: '#C8102E',
    gcp: '#4285F4',             // Google Cloud blue
    google: '#4285F4',
    azure: '#0078D4',           // Azure blue
    microsoft: '#0078D4',
    oracle: '#F80000'           // Oracle red
};

Multiple aliases added per provider to handle different naming conventions (e.g., huawei/huaweicloud, gcp/google).

Visual Preview

Volcengine color (#1764ff) matches the suggested value from the issue. Other colors align with official brand guidelines.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[bug] 需要在官网上对 volcengine 的 provider 进行颜色区分</issue_title>
<issue_description>目前 providerColorMap 代码中没有 volcengine，导致页面上 volcengine 为灰色

• https://github.com/wgpsec/redc-template/blob/master/index.html#L473C17-L473C18

需要添加 volcengine 的颜色支持，建议颜色为 #1764ff
同时，也添加华为云，谷歌云，微软云，oracle 云的颜色支持，建议用对应的官方配色</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [bug] 需要在官网上对 volcengine 的 provider 进行颜色区分 #17

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.