[FEATURE] Extensible version support

[sdatkinson]

Depending projects can define extensions to supported "version"s in .nam files. As demonstrated int eh test, one could for example develop an extension to this repo, develop .nam files with a version "DEMO::1.0.0" (and also register their respective DSP subclasses), and still use get_dsp() from this repo without worrying that it'll think that it doesn't know how to use the model you point it at. Also allows for different extensions to Core to be developed with independent versioning.

AI PR Description:

Summary

• Refactors model version validation in get_dsp to use a pluggable checker interface (IVersionSupportChecker) and a support-level enum (Supported: NO/PARTIAL/YES).
• Adds a thread-safe global registry with register_version_support_checker(...), and routes version decisions through is_version_supported(...) so core and custom checkers can coexist.
• Preserves current behavior for built-in semver NAM model versions via a default core checker, including partial-support handling and rejection of unsupported versions.
• Adds test coverage for both core support classification and custom checker registration, and wires the new tests into run_tests.

Why

• Enables external/custom architecture ecosystems to define their own version compatibility policies without forking the core loader logic.
• Centralizes support classification so future version logic changes are easier to extend and test.

Changes

• NAM/get_dsp.h
  • Introduces Supported enum.
  • Introduces IVersionSupportChecker interface.
  • Adds register_version_support_checker(...) and is_version_supported(...) APIs.
• NAM/get_dsp.cpp
  • Implements a default CoreVersionSupportChecker.
  • Adds registry + mutex for checker registration/lookups.
  • Refactors verify_config_version(...) to use is_version_supported(...).
• tools/test/test_get_dsp.cpp
  • Adds test_is_version_supported_core_behavior.
  • Adds test_register_custom_version_support_checker.
• tools/run_tests.cpp
  • Executes the two new tests in the test runner.

Test Plan

• Build tests: cmake --build build --target run_tests
• Run suite: ./build/tools/run_tests
• Verify success output (Success!)
• Confirm new test_get_dsp cases execute in run_tests