feat(ci): check uniqueness of aliases (#2223)

.github/workflows/pull-request.yml

@@ -68,6 +68,16 @@ jobs:
           # input: +++ b/icons/accessibility.json%0A@@ -2,0 +3 @@%0A+  "contributors": ["hi"],%0A@@ -13 +14 @@%0A+}%0A
           # output: ::$ANNOTATION_SEVERITY file=icons/accessibility.json,line=2,endLine=3,title=$ANNOTATION_TITLE::$ANNOTATION_DESCRIPTION%0A%0A+  "contributors": ["hi"],%0A@@ -13 +14 @@%0A+}%0A
 
+  lint-aliases:
+    name: Check Uniqueness of Aliases
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check Uniqueness of Aliases
+        run: ! cat <(printf "%s\\n" icons/*.json | while read -r name; do basename "$name" .json; done) <(jq -cr 'select(.aliases) | .aliases[] | if type=="string" then . else .name end' icons/*.json) | sort | uniq -c | grep -ve '^   1 '
+
   generate-changed-icons-comment:
     runs-on: ubuntu-latest
     permissions: