tests: fix CORE-V CLI host tests

[divyanshisingh987456321]

Description

The CLI unit-test target currently fails to build on Windows because app/app_commands.c depends on the hardware-specific uart_driver.h, which is not available in the host test environment.

This PR adds the required host-side mocks and updates the test configuration so that the CLI unit tests can be compiled and run on Windows.

Changes

• Updated tests/CMakeLists.txt
• Updated test_cli_commands.c
• Added host mocks under tests/mock/

Testing

Before these changes, the CLI test target was reproduced from a clean HEAD worktree on Windows and failed with:

fatal error: uart_driver.h: No such file or directory

After the changes:

• CLI test suite builds successfully on Windows
• All CLI tests pass
• Generated build output was cleaned up

No production application code was modified.