fix(nix): add shared package to bun install filters (#22665)

nix/node_modules.nix

@@ -55,6 +55,7 @@ stdenvNoCC.mkDerivation {
       --filter './packages/opencode' \
       --filter './packages/desktop' \
       --filter './packages/app' \
+      --filter './packages/shared' \
       --frozen-lockfile \
       --ignore-scripts \
       --no-progress