refactor: Greasy Fork should take precedence

YDX-2147483647/best-of-bits#188 (comment)
best-of-lists#74 (comment)

README.md

@@ -262,7 +262,7 @@ Every project can also be expanded to show additional project information (by cl
     </tr>
     <tr>
         <td><code>greasy_fork_id</code></td>
-        <td>Greasy Fork ID of the project. This is the number in script's URL, e.g. <code>299792458</code> for <code>https://greasyfork.org/scripts/299792458-speed-of-light</code>.</td>
+        <td>Greasy Fork ID of the project. This is the number in script's URL, e.g. <code>299792458</code> for <code>https://greasyfork.org/scripts/299792458-speed-of-light</code>. If set, homepage and description on Greasy Fork will take precedence over those on GitHub.</td>
     </tr>
 </table>
 

src/best_of/integrations/greasy_fork_integration.py

@@ -42,13 +42,17 @@ def update_project_info(self, project_info: Dict) -> None:
             )
             return
 
-        if not project_info.homepage:
+        # Greasy Fork takes precedence over GitHub.
+        # A GitHub repository may contain multiple scripts on Greasy Fork,
+        # therefore Greasy Fork gives more specific metadata.
+        if (
+            not project_info.homepage
+            or project_info.homepage == project_info.github_url
+        ):
             project_info.homepage = greasy_fork_info.url
 
-        if (
-            not project_info.description
-            or len(project_info.description) < MIN_PROJECT_DESC_LENGTH
-        ) and greasy_fork_info.description:
+        # Greasy Fork takes precedence for the same reason.
+        if greasy_fork_info.description:
             project_info.description = greasy_fork_info.description
 
         if not project_info.license: