Enable the yosys flow for Gowin boards - #405

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v3, actions/setup-dotnet@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Parameter 'projectExplorerService' is unread.

Converting null literal or possible null value to non-nullable type.

This call site is reachable on all platforms. 'ProtectedData.Unprotect(byte[], byte[]?, DataProtectionScope)' is only supported on: 'windows'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

This call site is reachable on all platforms. 'DataProtectionScope.CurrentUser' is only supported on: 'windows'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1416)

Possible null reference argument for parameter 'defaultValue' in 'AdvancedComboBoxSetting.AdvancedComboBoxSetting(string title, object defaultValue, AdvancedComboBoxOption[] options)'.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Dereference of a possibly null reference.

Unreachable code detected

The 'licenseUrl' element will be deprecated. Consider using the 'license' element instead.