fix: add bb clojure -P to populate ~/.deps.clj tools jar

The system clojure CLI stores its tools jar in the install directory,
not in ~/.deps.clj/. Only bb's built-in deps.clj writes there. Without
`bb clojure -P`, the mounted ~/.deps.clj/ is missing the tools jar
that bb expects at runtime.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: krukow

.github/workflows/copilot-setup-steps.yml

@@ -47,8 +47,11 @@ jobs:
           sudo ln -sf $(which java) /usr/local/bin/java
       - name: Pre-download Clojure deps and ensure global access
         run: |
-          # Download deps and tools jar (version pinned to match bb's built-in deps.clj)
+          # Download Maven deps via system clojure
           clojure -P
+          # Populate ~/.deps.clj/ with the tools jar that bb expects —
+          # the system clojure stores its jar in the install dir, not ~/.deps.clj/
+          bb clojure -P
           # Ensure deps directories are readable by any user
           chmod -R a+rX ~/.m2/repository ~/.deps.clj 2>/dev/null || true
       - name: Install gh-aw extension