Revert Install SDK to working directory

fix: document version reset on textDocument/didSave (#2695)

Fixes #2375

This PR fixes an issue where the document version is reset to `0` on
`textDocument/didSave`.

It is not documented in the LSP that the version should reset, see:
https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_didSave.

This caused a document version mismatch in editors when applying code
actions (for example see
zed-industries/zed#31014).

Update roslyn 5.3.0 2.25557.6 (#2696)

Update Roslyn to 5.1.0-1.25475.3 (#2692)

Clean up NuGet.Config by removing unused sources (#2689)

Configure Dependabot for NuGet package updates

Update README to explain preferred Arch build process (#2684)

I maintain the Arch AUR image for omnisharp-roslyn, and we dont use mono
at all, we build directly with the dotnet CLI and MSbuild, by making a
few tweaks to the build process.

I noticed that your readme still directs linux users to mono, so I
thought I'd point them to our process that doesn't require mono.

Add linux-bionic-arm64 build (#2653)

[Build
log](https://github.com/OmniSharp/omnisharp-roslyn/actions/runs/16761470084/job/47457514100?pr=2653#step:7:4297)
showing the linux-bionic-arm64 packages were created.

Update Roslyn to 5.0.0-2.25373.17 (#2679)

Builds on the SDK update PR
#2652

Update SDKs (#2652)