fix: pr-suites-packs.sh full-mode must target each pack subdir, not $LANGUAGE

codeql pack install/create requires a directory containing a qlpack.yml
directly. No language has a top-level qlpack.yml (only nested src/, lib/,
ext/, ext-library-sources/) so `codeql pack install "$LANGUAGE"` fails
with "ERROR: The directory is not a qlpack." Loop over the actual pack
subdirectories instead, matching what codeql-workspace.yml's
`**/qlpack.yml` globs actually resolve to.

Caught by dispatching this branch's workflow_dispatch run directly -
cpp/go/ruby all failed identically before this fix.

Author: felickz

.github/scripts/pr-suites-packs.sh

@@ -19,9 +19,13 @@ if [[ -z "$PR_NUMBER" ]]; then
         done < <(find "$LANGUAGE/suites" -name '*.qls' -print0)
     fi
 
-    echo "[+] Compiling Pack: $LANGUAGE"
-    codeql pack install "$LANGUAGE"
-    codeql pack create "$LANGUAGE"
+    for pack_dir in "$LANGUAGE/src" "$LANGUAGE/lib" "$LANGUAGE/ext" "$LANGUAGE/ext-library-sources"; do
+        if [[ -f "$pack_dir/qlpack.yml" ]]; then
+            echo "[+] Compiling Pack: $pack_dir"
+            codeql pack install "$pack_dir"
+            codeql pack create "$pack_dir"
+        fi
+    done
 
     echo "[+] Complete"
     exit 0