Fix Spectre.Console.Cli 0.53.1 API breaking changes

Co-authored-by: kzu <169707+kzu@users.noreply.github.com>
Agent-Logs-Url: https://github.com/devlooped/dotnet-gcm/sessions/307cf743-a120-43ee-95a0-37a8cb124ea8

⬆️ Bump files with dotnet-file sync

# devlooped/oss

- Add nullable and generated code annotations devlooped/oss@b2a11fa
- Revert back to dotnet-sponsor devlooped/oss@8d29f01
- Add copylocal behavior when merging assemblies devlooped/oss@7cda4a1
- Add our implementation of JWT manifest reading and reporting devlooped/oss@a0ae727
- Simplify and unify manifest reading implementation devlooped/oss@4fca946
- Minimal docs on consuming devlooped/oss@827a1d1
- Integrate more seamlessly with the existing workflows devlooped/oss@e732f6a
- Whitespace and formatting devlooped/oss@d74f511
- Update to checkout@v4 devlooped/oss@5fb1723
- Cleanup build and publish to use VersionLabel devlooped/oss@14deaea
- Don't add random wait on manual dotnet-file runs devlooped/oss@7afe350
- Add compatibility for non-SDK projects without InitializeSourceControlInformation target devlooped/oss@6e96c59
- Set Version from VersionLabel if it's a refs/tags/ devlooped/oss@57653a2
- Only commit markdown files when resolving includes devlooped/oss@2c10a83

Add backwards compatibility renaming for --protocol

Which is now --scheme.

To make the option consistent across all three commands, we renamed --protocol to --scheme so we could always use the shorthand -s regardless of whether there was a -p|--password option too.

This caused older invocations to break since the protocol would be null/empty and thus a matching provider was not found (i.e. for github).

Fixes #25

Update GCM description to match latest

It's no longer *Microsoft* GCM, since now it's part of the git-ecosystem org (see https://github.com/git-ecosystem/git-credential-manager).

+Mᐁ includes

Bump to latest GCM release v2.0.886 and .NET6 RTM

Pack the actual project readme, not the repo root one

+Mᐁ includes

Update to .net6 LTS and new submodule path

Restore missing icon