Update octicons and use octicon-file-directory-symlink (#25453)

Make use of the [new
octicon](primer/octicons#945) that indicates a
symlink to a directory:

<img width="189" alt="Screenshot 2023-06-22 at 22 50 57"
src="https://github.com/go-gitea/gitea/assets/115237/a70690ea-ebfc-48fe-af23-cdc33bcb2098">

Author: silverwind

modules/base/tool.go

@@ -210,7 +210,7 @@ func EntryIcon(entry *git.TreeEntry) string {
 			return "file-symlink-file"
 		}
 		if te.IsDir() {
-			return "file-submodule"
+			return "file-directory-symlink"
 		}
 		return "file-symlink-file"
 	case entry.IsDir():

package-lock.json

@@ -13,7 +13,7 @@
     "@github/relative-time-element": "4.3.0",
     "@github/text-expander-element": "2.5.0",
     "@mcaptcha/vanilla-glue": "0.1.0-alpha-3",
-    "@primer/octicons": "19.3.0",
+    "@primer/octicons": "19.4.0",
     "@webcomponents/custom-elements": "1.6.0",
     "add-asset-webpack-plugin": "2.0.1",
     "ansi_up": "5.2.1",

package.json

@@ -170,7 +170,7 @@ func TestViewRepoWithSymlinks(t *testing.T) {
 	})
 	assert.Len(t, items, 5)
 	assert.Equal(t, "a: svg octicon-file-directory-fill", items[0])
-	assert.Equal(t, "link_b: svg octicon-file-submodule", items[1])
+	assert.Equal(t, "link_b: svg octicon-file-directory-symlink", items[1])
 	assert.Equal(t, "link_d: svg octicon-file-symlink-file", items[2])
 	assert.Equal(t, "link_hi: svg octicon-file-symlink-file", items[3])
 	assert.Equal(t, "link_link: svg octicon-file-symlink-file", items[4])

public/img/svg/octicon-copilot-error.svg

@@ -281,7 +281,8 @@
 }
 
 .repository.file.list #repo-files-table tbody .svg.octicon-file,
-.repository.file.list #repo-files-table tbody .svg.octicon-file-symlink-file {
+.repository.file.list #repo-files-table tbody .svg.octicon-file-symlink-file,
+.repository.file.list #repo-files-table tbody .svg.octicon-file-directory-symlink {
   color: var(--color-secondary-dark-7);
 }