Migrate all projects to target .NET 10.0 exclusively, removing legacy
target frameworks. Implement dynamic MSBuild inheritance by injecting
Directory.Build.props and .targets to pull configuration from the
parent repository root.

Disable internal NativeLibrary.SetDllImportResolver logic in NativeMethods.
Native dependency resolution is now deferred entirely to the cross-platform
module initializer managed by the parent DjvuNet build tasks.

Modernize cryptographic API usage in CertificateX509 by migrating from the
deprecated X509Certificate byte array constructor to the secure
X509CertificateLoader.LoadCertificate method.

Expose assembly internals to DjvuNet testing projects via a generated
AssemblyInfo template.

Signed-off-by: Jacek Blaszczynski <jacek.blaszczynski@outlook.com>

During the DjvuNet CI migration to GitHub Actions, the custom MSBuild
tasks dependent on LibGit2Sharp failed to load on ARM64 architectures.
This was traced to LibGit2Sharp inheriting global platform properties
(like RuntimeIdentifier or Platform) from the parent CI build process,
which corrupted the generated deps.json file and prevented native
binary resolution.

Explicit AnyCPU platform enforcement and TreatAsLocalProperty directives
have been added to the project file. This ensures the library strictly
compiles as a platform-agnostic artifact and correctly resolves its
cross-platform native dependencies at runtime, regardless of the outer
build environment.

Signed-off-by: Jacek Błaszczyński <jacek.blaszczynski@outlook.com>

Signed-off-by: Jacek Blaszczynski <jacek.blaszczynski@outlook.com>

Restore Visual Studio IDE tooling support by building versioned
tooling against net10.0 and net472. Its required to run
DjvuNet.Build.Tasks in-process while MSbuild netfx version
is used by VS to work with managed code.

Signed-off-by: Jacek Błaszczyński <jacek.blaszczynski@outlook.com>

Update the README to explicitly document the modifications made for the
DjvuNet project. This explains the fork's support for easy OS and platform
multitargeting, reliable native dependency resolution, and shared build
directories across different OSes and clients (e.g., Windows and WSL).

Signed-off-by: Jacek Błaszczyński <jacek.blaszczynski@outlook.com>