fix: skip anchor files in ci workflow validation

the workflow was only skipping .verify files but not .anchor files,
causing validation to fail when trying to validate anchor documents
as regular manifold files.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: dhanesh

.github/workflows/manifold-verify.yml

@@ -79,8 +79,8 @@ jobs:
             for f in .manifold/*.yaml; do
               if [ -f "$f" ]; then
                 feature=$(basename "$f" .yaml)
-                # Skip verify files
-                if [[ "$feature" != *.verify ]]; then
+                # Skip anchor and verify files (they have different schemas)
+                if [[ "$feature" != *.anchor && "$feature" != *.verify ]]; then
                   echo "Validating: $feature"
                   manifold validate "$feature" --json || exit 1
                 fi
@@ -109,8 +109,8 @@ jobs:
             for f in .manifold/*.yaml; do
               if [ -f "$f" ]; then
                 feature=$(basename "$f" .yaml)
-                # Skip verify files
-                if [[ "$feature" != *.verify ]]; then
+                # Skip anchor and verify files (they have different schemas)
+                if [[ "$feature" != *.anchor && "$feature" != *.verify ]]; then
                   echo "Verifying: $feature"
                   manifold verify "$feature" --json
                   RESULT=$?
@@ -141,7 +141,8 @@ jobs:
             for f in .manifold/*.yaml; do
               if [ -f "$f" ]; then
                 feature=$(basename "$f" .yaml)
-                if [[ "$feature" != *.verify ]]; then
+                # Skip anchor and verify files (they have different schemas)
+                if [[ "$feature" != *.anchor && "$feature" != *.verify ]]; then
                   echo "### $feature" >> $GITHUB_STEP_SUMMARY
                   manifold status "$feature" >> $GITHUB_STEP_SUMMARY
                   echo "" >> $GITHUB_STEP_SUMMARY