This change allows Syncthing to be launched from Explorer without
showing a console window, while preserving the existing command-line
behavior.
Previously, launching syncthing.exe from Explorer would always allocate
a console window, which could only be hidden later by using
`--no-console`. It was not possible to avoid console allocation entirely
without introducing other issues.
On Windows 24H2 and later a new application manifest allows us to
achieve it. See [console allocation
policy](https://learn.microsoft.com/en-us/windows/console/console-allocation-policy)
This manifest is built into a syso-file by `goversioninfo`, which is
already used to generate Windows resource files consumed by the Go
compiler.
**Note1:** On Windows 24H2 and later, no console is allocated when
Syncthing is launched from Explorer, even if `--no-console` is set to
`False`. It can still be used as a CLI tool as usual if you call it from
console.
**Note2:** The content of the manifest file may not be formatted. Even a
`newline` would break it.
### Testing
Tested on Windows 11 25H2: No console visible from explorer. CLI works
as usual.
Ref #8046, ref #10633, ref #10481, ref #10600
Signed-off-by: Elias <1elias.bauer@gmail.com>
Co-authored-by: Elias <1elias.bauer@gmail.com>
