Dynamic Data Files

Fixes:

• [9bc6b4] Fix race in ExpireAfter when item is removed or updated before expiration fires (#1076) @dwcullop
• [7b861d] Fixed that the cache-land dynamic .Filter() operator relied on limited mutation of an internal Dictionary<,> during enumeration, a behavior that is not supported on target frameworks older than .NET Core 3.0. Additional logic to copy the keys to iterate, before mutation, should now be injected for builds targeting such older frameworks. (#1084) @JakenVeina
• [b93a6b] Fix docs and exception messages for Change (#1085) @xackus
• [cc8b91] Fixed that the Build and Release action defined in release.yml was attempting to publish a bogus "empty.nupkg" file that exists in the normal build output of the DynamicData.Tests project, as a part of the EmptyFiles package, since the job was written to search for "*.nupkg". (#1124) @JakenVeina

Other:

• [bf4544] Add AI Instruction Files for GitHub Copilot (#1078) @dwcullop
• [12c194] Overhaul XML documentation for ObservableCacheEx extension methods (#1080) @dwcullop
• [b0d4c7] Update SwappableLock to support NET9+ Lock type (#1077) @dwcullop
• [b96694] Add DynamicAccessedMembers attributes to BindingListEx methods (#1087) @daniel-lerch
• [28adb4] Overhaul XML documentation for ObservableListEx extension methods (#1081) @dwcullop
• [335ecb] Add Preview workflows and enforce versioning rules (#1088) @dwcullop
• [d59ed5] Replace softprops/action-gh-release with gh CLI (#1092) @dwcullop
• [767f27] Restore stable 9.4 versioning on release/9.x (#1123) @dwcullop

Test:

• [c1c312] test: fix AsyncDisposeMany thread safety test timeout on CI (#1082) @dwcullop