[Feature] Per-run --project/--folder override or repo-local TMS binding

[tlemmonds]

Environment: kane-cli 0.4.10

Summary
Test Manager project/folder is global mutable state (~/.testmuai/kaneai/tui-config.json) with no --project/--folder flag on run / testmd run and no workspace awareness. Runs upload into whatever was last configured → cross-project bleed when switching between repos.

Ask

• Add --project / --folder flags to run and testmd run, and/or
• Honor a repo-local .testmuai/ binding (cwd-scoped), consistent with how variables/context are already cwd-local.

Why
Variables and context are cwd-local, but the TMS target is global — inconsistent, and easy to silently write to the wrong project. Related: #45 (env profiles + secrets).

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