Tools folder is always created at the workspace root

if I keep my cake scripts in a folder called `scripts` and open vscode with bakery globally installed and the workspace root one level up, it will restore packages to the workspace root.

I tried adding a `cake.config` to the workspace root, but that doesn't seem to be respected.

**What happens**

```
- scripts
- build.cake
- tools
- foo.txt
```

**What is expected**

```
- scripts
- tools
- build.cake
- foo.txt
```

Start by tracing how Bakery discovers the workspace root, reads cake.config, and chooses the package-restoration location for scripts/build.cake. Reproduce the nested scripts layout described in the issue and verify that the tools directory is created under scripts rather than the workspace root.

Written by the indexing model from the issue text.