Add support for GitHub Gist platform

Added GitHub Gist ('gist') to the supported platforms in the configuration, updated documentation in both English and Chinese READMEs, and included related tests to ensure correct path transformation and base URL.

README.en.md

@@ -139,6 +139,7 @@ Using the pre-deployed instance **`xget.xi-xu.me`** or your own deployed instanc
 | Platform | Platform Prefix | Original URL Format | Accelerated URL Format |
 |----------|----------------|---------------------|------------------------|
 | GitHub | `gh` | `https://github.com/...` | `https://xget.xi-xu.me/gh/...` |
+| GitHub Gist | `gist` | `https://gist.github.com/...` | `https://xget.xi-xu.me/gist/...` |
 | GitLab | `gl` | `https://gitlab.com/...` | `https://xget.xi-xu.me/gl/...` |
 | Gitea | `gitea` | `https://gitea.com/...` | `https://xget.xi-xu.me/gitea/...` |
 | Codeberg | `codeberg` | `https://codeberg.org/...` | `https://xget.xi-xu.me/codeberg/...` |
@@ -185,6 +186,16 @@ https://github.com/microsoft/vscode/archive/refs/heads/main.zip
 https://xget.xi-xu.me/gh/microsoft/vscode/archive/refs/heads/main.zip
 ```
 
+#### GitHub Gist
+
+```url
+# Original URL
+https://gist.github.com/xixu-me/e2ea9db6b1f143892495f796fef18631/raw/3b8807172ee492d0da3a7e370b0fb88fc97b53e6/Free-ChatGPT-Paid-Plan.md
+
+# Converted (add gist prefix)
+https://xget.xi-xu.me/gist/xixu-me/e2ea9db6b1f143892495f796fef18631/raw/3b8807172ee492d0da3a7e370b0fb88fc97b53e6/Free-ChatGPT-Paid-Plan.md
+```
+
 #### GitLab
 
 ```url

README.md

@@ -148,6 +148,7 @@
 | 平台 | 平台前缀 | 原始 URL 格式 | 加速 URL 格式 |
 |------|----------|--------------|--------------|
 | GitHub | `gh` | `https://github.com/...` | `https://xget.xi-xu.me/gh/...` |
+| GitHub Gist | `gist` | `https://gist.github.com/...` | `https://xget.xi-xu.me/gist/...` |
 | GitLab | `gl` | `https://gitlab.com/...` | `https://xget.xi-xu.me/gl/...` |
 | Gitea | `gitea` | `https://gitea.com/...` | `https://xget.xi-xu.me/gitea/...` |
 | Codeberg | `codeberg` | `https://codeberg.org/...` | `https://xget.xi-xu.me/codeberg/...` |
@@ -194,6 +195,16 @@ https://github.com/microsoft/vscode/archive/refs/heads/main.zip
 https://xget.xi-xu.me/gh/microsoft/vscode/archive/refs/heads/main.zip
 ```
 
+#### GitHub Gist
+
+```url
+# 原始 URL
+https://gist.github.com/xixu-me/e2ea9db6b1f143892495f796fef18631/raw/3b8807172ee492d0da3a7e370b0fb88fc97b53e6/Free-ChatGPT-Paid-Plan.md
+
+# 转换后（添加 gist 前缀）
+https://xget.xi-xu.me/gist/xixu-me/e2ea9db6b1f143892495f796fef18631/raw/3b8807172ee492d0da3a7e370b0fb88fc97b53e6/Free-ChatGPT-Paid-Plan.md
+```
+
 #### GitLab
 
 ```url

src/config/platforms.js

@@ -4,6 +4,7 @@
  */
 export const PLATFORMS = {
   gh: 'https://github.com',
+  gist: 'https://gist.github.com',
   gl: 'https://gitlab.com',
   gitea: 'https://gitea.com',
   codeberg: 'https://codeberg.org',

test/platforms.test.js

@@ -6,6 +6,7 @@ describe('Platform Configuration', () => {
     it('should have all required platforms defined', () => {
       const requiredPlatforms = [
         'gh',
+        'gist',
         'gl',
         'sf',
         'gitea',
@@ -46,6 +47,14 @@ describe('Platform Configuration', () => {
       expect(transformPath('/gh/user/repo.git', 'gh')).toBe('/user/repo.git');
     });
 
+    it('should transform GitHub Gist paths correctly', () => {
+      expect(transformPath('/gist/username/gist-id/raw/file.txt', 'gist')).toBe(
+        '/username/gist-id/raw/file.txt'
+      );
+
+      expect(transformPath('/gist/username/gist-id.git', 'gist')).toBe('/username/gist-id.git');
+    });
+
     it('should transform GitLab paths correctly', () => {
       expect(transformPath('/gl/gitlab-org/gitlab/-/archive/master/gitlab-master.zip', 'gl')).toBe(
         '/gitlab-org/gitlab/-/archive/master/gitlab-master.zip'
@@ -141,6 +150,10 @@ describe('Platform Configuration', () => {
       expect(PLATFORMS.gh).toBe('https://github.com');
     });
 
+    it('should have correct GitHub Gist base URL', () => {
+      expect(PLATFORMS.gist).toBe('https://gist.github.com');
+    });
+
     it('should have correct GitLab base URL', () => {
       expect(PLATFORMS.gl).toBe('https://gitlab.com');
     });