feat!(Paket.restore.targets): Support `dotnet restore` without `paket restore`; avoid null git diffs

[Ruben Bartelink]

Context

• Paket referenced via dotnet.tools.json (v 7.2.1); same version spec in paket.dependencies
• per what I believe to be common practice, I specify * text=auto in .gitattributes; 99% of files are thus LF endings

Description

The paket docs don't provide a pit of success for the combo of:

• using git
• being able to dotnet restore or dotnet build from a clean clone (or git clean -fdx)
• NOT having to run dotnet paket restore (as dotnet restore seems to include it and Just Work as long a the Paket.restore.targets file is present)

Expected behavior

• Never end up with line-ending only diffs in git
• Never have to invoke paket restore

Actual behavior

1. If/when I edit/merge Paket.restore.targets, the line endings change to LF
2. If/when I paket install etc, the file is replaced with a CRLF-endings based file
3. If I don't commit `Paket.restore.targets, restore does not work without a paket restore

Desired behavior/crazy ideas

I'd be very happy to be told about the xyproblem.info nature of my reasoning and told a better solution, but I feel I've definitely done the legwork to try to figure this out!

I see the following potential general directions to resolve the issue:

1. Add a doc section that covers what to do (atm it has many generations of advice, but nothing that suggests that it's currently a good idea to add Paket.restore.targets to your repo). I would propose to add some version of the Known Workarounds below to the docs.
2. Tweak Paket's behavior in minor ways. e.g.
   • if it figured out the expected line endings and wrote paket.restore.targets per that ?
   • if paket autorestore printed a message recommending to commit the Paket.restore.targets ?
3. Do a more complete fix or V8, e.g.

• Have a /paket.targets in base of repo (with line endings per .gitattributes)
• Update the docs to say to commit /paket.*
• Either have Paket autorestore put a CRLF override in the .gitattributes, or respect the repo's rules

I'd be prepared to do solution 1 if I get enough input

I am not sufficiently au fait with current gen paket to do solution 2

I don't realistically have bandwidth to contribute to the impl of solution 3, though I'll obviously test and type here.

Known workarounds

(Assuming typical gitattributes with typical * text=auto in effect)

1. Add .paket/Paket.restore.targets eol=crlf to .gitattributes
2. Add .paket/Paket.restore.targets to source control (with CRLF line endings)