PowerShell support through LSP

PowerShell has a language server:

• https://github.com/PowerShell/PowerShellEditorServices 

It is used by:

• coc-powershell: https://github.com/coc-extensions/coc-powershell 
• intellij-powershell: https://github.com/ant-druha/intellij-powershell 
• lsp-pwsh: https://github.com/emacs-lsp/lsp-mode/blob/master/clients/lsp-pwsh.el 
• powershell.nvim: https://github.com/TheLeoP/powershell.nvim 
• vscode-powershell: https://github.com/PowerShell/vscode-powershell 
• zed-powershell: https://github.com/wingyplus/zed-powershell 

Would be great if Fleet added support for PowerShell too. 😊