feat: add shim proof of concept

examples/black

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+"""
+Proof of concept output for a 'shim generator'
+that would essentially emulate pipx
+
+A possible cli signature
+
+viv shim black -o ~/bin/black
+"""
+
+import sys
+
+sys.path.append("/home/daylin/.viv/src")  # noqa
+import subprocess
+import viv
+
+if __name__ == "__main__":
+    vivenv = viv.use(
+        "black==23.3.0",
+        "click==8.1.3",
+        "mypy-extensions==1.0.0",
+        "packaging==23.1",
+        "pathspec==0.11.1",
+        "platformdirs==3.5.1",
+    )
+    sys.exit(
+        subprocess.run(
+            [
+                vivenv.path / "bin" / "black",
+                *sys.argv[1:],
+            ]
+        ).returncode
+    )