Request: prevent ScrCpy window from closing when I close Android Studio or on other similar cases

- [ V] I have checked that a similar [feature request](https://github.com/Genymobile/scrcpy/issues?q=is%3Aopen+is%3Aissue+label%3A%22feature+request%22) does not already exist.

**Is your feature request related to a problem? Please describe.**
Yes. As I often use ScrCpy together with Android Studio, but also when not, I often need to close Android Studio, but then ScrCpy closes too.

**Describe the solution you'd like**
To have ScrCpy stay till I'm the one who closes it.

**Describe alternatives you've considered**
The current "workaround" is to start it again.

**Additional context**
Examples that such a thing occur, related to Android Studio:
1. Update of the IDE
2. Enable/disable a plugin in the IDE, which requires a restart
3. Closing all windows of the IDE, manually.
4. Some closing/starting combination related to multiple versions of the IDE (sometimes I use stable and canary versions of the IDE, at the same time).

Reproduce the reported behavior by running scrcpy alongside Android Studio, then close or restart the IDE in the listed scenarios. Trace the scrcpy window and process lifecycle from its startup entry point; done means scrcpy remains open after the IDE closes and still closes when the user closes it.

Written by the indexing model from the issue text.