[lldb] Turn on OSC 9;4 graphical progress in supported terminals (#185541) In #162162, I added support for OSC 9;4 graphical progress. I put it behind the `show-progress` setting because I didn't have a reliable way to detect whether the escape code was supported by the terminal. Since then, more tools have added support for it, most notably Claude Code and Homebrew. While I still don't have a good way to detect this, there are a handful of known terminals that are easy enough to identify. This PR toggles the default of `show-progress` to on again and puts showing the progress behind a check for those known terminals (Windows Terminal, ConEmu & Ghostty). This means that if you're running in one of those, you'll get the visual progress by default unless you set `show-progress` to off. The downside is that if you're on an unrecognized terminal, you can't force it on any longer by setting `show-progress` to on. I think that's a fair trade-off as the setting wasn't really advertised and I doubt many people are using that. As a workaround, they can set `OSC_PROGRESS` to spoof an OSC-supporting terminal.
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