[Windows] Improve console wrapper script to handle stdin and child processes.

[bruvzg]

Uses PowerShell Start-Process cmdlet to start and wait for the Godot editor process, which:

• Correctly passes stdin input to the Godot process.
• Unlike cmd, it waits for the all child processes as well.

Additional changes:

• Passes command line arguments from the script (%*).
• Fixes start if executable is not in the current working directory, by adding script path (%~dp0).
• Set console title to "Godot Engine".

Note: Need to be tested on Windows 7 and 8.1.

[bruvzg]

Note: Need to be tested on Windows 7 and 8.1.

Seems like it doesn't work with older PowerShell versions.

[bruvzg]

Superseded by https://github.com/godotengine/godot/pull/67434 (I'll open a new PR for the build scripts when the main repo one is done).