Currently, building on Windows may fail for people who have not enabled
long filepaths on Windows itself.
This PR adds the solution to the troubleshooting section in the
`Building Zed for Windows` guide.
For an example failure error message:
```rs
error: failed to get `pet` as a dependency of package `languages v0.1.0 (D:\a\zed-windows-builds\zed-windows-builds\crates\languages)`
Caused by:
failed to load source for dependency `pet`
Caused by:
Unable to update https://github.com/microsoft/python-environment-tools.git?rev=ffcbf3f28c46633abd5448a52b1f396c322e0d6c#ffcbf3f2
Caused by:
path too long: 'C:/Users/runneradmin/.cargo/git/checkouts/python-environment-tools-903993894b37a7d2/ffcbf3f/crates/pet-conda/tests/unix/conda_env_without_manager_but_found_in_history/some_other_location/conda_install/conda-meta/python-fastjsonschema-2.16.2-py310hca03da5_0.json'; class=Filesystem (30)
```
Release Notes:
- N/A
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