Backfills the standard MIT X11 header on hand-written files that never
got one, attributing each to its first-commit author and year from git
history. Code vendored from dotnet/runtime and Humanizr/Humanizer gets
its origin's license lines and a provenance note instead. Generated
files (Resources.Designer.cs, the version-info template), tool-managed
suppression files, and BAML test-case fixtures intentionally stay
header-less.
Assisted-by: Claude:claude-fable-5:Claude Code
* Migrate ILSpy.AddIn.VS2022 to SDK-style VSIX project
* Retire the legacy VS2017/2019 ILSpy add-in
* Build the VS extension via dotnet build on the slnx
* Inline ILSpy.AddIn.Shared into ILSpy.AddIn.VS2022
* Restore the VS add-in menus broken by the SDK-style migration