compat: declare SciMLTesting 2.10

[ChrisRackauckas-Claude]

Summary

Declare the missing SciMLTesting compatibility bound as 2.10 and add its UUID to package test extras in the affected manifest(s):

• lib/BVProblemLibrary/Project.toml
• lib/DAEProblemLibrary/Project.toml
• lib/DDEProblemLibrary/Project.toml
• lib/JumpProblemLibrary/Project.toml
• lib/NonlinearProblemLibrary/Project.toml
• lib/ODEProblemLibrary/Project.toml
• lib/SDEProblemLibrary/Project.toml

This PR is manifest-only. It does not change source behavior, tests, public APIs, or documentation.

Verification

• Julia TOML.parsefile passed for all TOML files in the 20-repository batch.
• Pkg.Types.read_project passed for all 32 changed manifests, including the new compat and extras entries.
• git diff --check passed for all 20 repositories.
• typos passed on all changed TOML files.
• Runic was not run because the diff contains TOML only.
• No test suite was run because no source or test files changed.

Please ignore this draft until reviewed by @ChrisRackauckas.