Remove ktx extensions and add agents file type

Removed 'ktx' and 'ktx2' from file extensions and added 'agents' with associated file names.

Signed-off-by: writedev <160499331+writedev@users.noreply.github.com>

Author: writedev

src/core/icons/fileIcons.ts

@@ -206,8 +206,6 @@ export const fileIcons: FileIcons = {
         'srf',
         'srw',
         'x3f',
-        'ktx',
-        'ktx2',
       ],
     },
     { name: 'palette', fileExtensions: ['pal', 'gpl', 'act'] },
@@ -3381,6 +3379,11 @@ export const fileIcons: FileIcons = {
       name: 'cue',
       fileExtensions: ['cue'],
     },
+    {
+      name: 'agents',
+      fileNames: ['agents.md'],
+      light: true,
+    },
     {
       name: 'mcp',
       fileNames: ['mcp.json'],