Migrate to tox-uv-bare

This removes the need to have `uv` itself packaged into the venv.
We now use the devcontainer's default uv version.

The devcontainer.json changes are to deal with a migration issue that
can occur due to older uv versions being in the venv - if that old
version no longer meets the required version in `pyproject.toml` ->
 `tool.uv` -> `required-version` it means you end up with a venv that
cannot run any uv commands as it is below the minimum version.

Author: AlexanderWells-diamond

.devcontainer/devcontainer.json

@@ -68,5 +68,6 @@
     // Mount the parent as /workspaces so we can pip install peers as editable
     "workspaceMount": "source=${localWorkspaceFolder}/..,target=/workspaces,type=bind",
     // After the container is created, recreate the venv then make pre-commit first run faster
-    "postCreateCommand": "uv venv --clear && uv sync && pre-commit install --install-hooks"
+    // Ensure we use system uv, as there might be a different (old) version of uv in the venv
+    "postCreateCommand": "/usr/bin/uv venv --clear && /usr/bin/uv sync && pre-commit install --install-hooks"
 }

pyproject.toml

@@ -18,7 +18,7 @@ dev = [
     "sphinx-autobuild",
     "sphinx-copybutton",
     "sphinx-design",
-    "tox-uv",
+    "tox-uv-bare",
 ]
 
 [tool.uv]

template/pyproject.toml.jinja

@@ -34,7 +34,7 @@ dev = [
     {% if sphinx %}"sphinx-autobuild",
     "sphinx-copybutton",
     "sphinx-design",
-    {% endif %}"tox-uv",
+    {% endif %}"tox-uv-bare",
     "types-mock",
 ]