feat: enhance previewers configuration for image formats

lua/plugins/telescope.lua

@@ -196,7 +196,24 @@ end
 
 if require('data.func').check_global_var('use_fzf_lua', true, false) then
   table.insert(P, 1, { import = 'lazyvim.plugins.extras.editor.fzf' })
-  table.insert(P, 2, { 'ibhagwan/fzf-lua', lazy = false, opts = {} })
+  table.insert(P, 2, {
+    'ibhagwan/fzf-lua',
+    lazy = false,
+    opts = {
+      previewers = {
+        builtin = {
+          extensions = {
+            -- neovim terminal only supports `viu` block output
+            ['png'] = { 'viu', '-b' },
+            -- by default the filename is added as last argument
+            -- if required, use `{file}` for argument positioning
+            ['svg'] = { 'viu', '-b' },
+            ['jpg'] = { 'viu', '-b' },
+          },
+        },
+      },
+    },
+  })
 end
 
 return P