Add a TUI mode to the new tachyon profiler

[pablogsal]

Live TUI profiling has become an extremely popular feature in modern profiling tools because it allows users to observe application behavior as it runs, rather than aggregating all profiling data into a final output that must be analyzed after execution completes. This fundamentally changes how performance investigation works: users can watch their application's performance characteristics evolve in real-time, understanding how different phases of execution behave, identifying transient bottlenecks as they occur, and immediately validating that optimizations are having the intended effect.

This is particularly valuable for long-running applications where waiting for completion is impractical, for understanding time-dependent behavior that gets lost in aggregate statistics, or for rapid experimentation during development where immediate feedback accelerates the debugging cycle.

Example of how this looks:

screenrecording-2025-11-16_18-44-37.mp4

Linked PRs

• gh-141645: Add a TUI mode to the new tachyon profiler #141646
• gh-141645: Refactor tachyon's live TUI tests to not use private fields #141806
• gh-141645: Add profiling/sampling/live_collector to the makefile and remove spurious file #141820