Add a few modes to tts.ts

[dzianisv]

Let's use 2 mods for tts: short and long.
In summary mode just report that task completed.
Name directory, and one sentence task description.
Use free models, like co-pilot gpt-4.1 to summarize task and outcome.
In result in a short mode I have to hear Task "summary" completed in "directory name": "short summary of outcome".

Extend /tts command. To have /tts short, /tts long, /tts on = /tts short; / tts off.