[direnv]: add direnvrc file.

.config/direnv/direnvrc

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+JULIA_VERSIONS="/opt/julia"
+
+julia_args() {
+    # Create a bin directory
+    mkdir -p bin
+    # Create a wrapper script to call julia with the arguments
+    echo "#!/bin/bash
+    exec $(which julia) "$@" \"\$@\"
+    " > bin/julia
+    # Make it executable
+    chmod +x bin/julia
+    # Make sure bin is in PATH
+    PATH_add bin
+}