More gracefully fail on `pyproject.toml` error

Ninguém assumiu esta issue ainda.

tried going through the "create environment..." flow with a `pyproject.toml` file but I had an error since my `pyproject.toml` file was incorrectly formatted. Would be good if the error message was better or it failed more gracefully

```
Resolved Python Environment /Users/eleanorboyd/python-envs-scenarios/existing-env-folder/.venv/bin/python
2025-05-14 09:19:39.308 [info] Running: uv pip install --python /Users/eleanorboyd/python-envs-scenarios/existing-env-folder/.venv/bin/python -e /Users/eleanorboyd/python-envs-scenarios/existing-env-folder
2025-05-14 09:19:39.378 [info] error: Failed to extract static metadata from `pyproject.toml`
Caused by: TOML parse error at line 6, column 8
|
6 | name = "existing env folder"
| ^^^^^^^^^^^^^^^^^^^^^
Not a valid package or extra name: "existing env folder". Names must start and end with a letter or digit and may only contain -, _, ., and alphanumeric characters.

```

Comece pelo fluxo "create environment..." e pela invocação registrada `uv pip install --python ... -e ...`, usando o exemplo de `pyproject.toml` malformado para reproduzir a falha. Está concluído quando o fluxo relata o erro de metadados do pacote com mais clareza ou encerra normalmente, em vez de expor a falha bruta.

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