chore: Release version 3.0.0

## Breaking Changes
- Target .NET 9.0 only (dropped .NET 8.0 support)
- TransferWatch redesigned to avoid allocations

## New Features
- BytesPerSecond: Immutable struct for transfer rates
- TransferWatch: Zero-allocation transfer rate monitoring
- TransferStatistics: Immutable snapshot of transfer metrics
- Full serialization support for all new types

## Improvements
- Zero memory allocations in TransferWatch after construction
- Thread-safe concurrent operations
- Comprehensive unit test coverage (203 tests)

Author: rafalmaciag

src/ModelingEvolution.Bytes/ModelingEvolution.Bytes.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <PackageId>ModelingEvolution.Bytes</PackageId>
-    <Version>2.0.0</Version>
+    <Version>3.0.0</Version>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
   </PropertyGroup>