Installer: Set Windows path env variable when installing

[elivlo]

• YubiKey Manager version: 1.2.4
• How was it installed?: Windows Installer
• Operating system and version: Windows 11 21H2
• YubiKey model and version: YubiKey 5 NFC
• Bug description summary: The path to ykman.exe is not set. Other apps are not able to find the CLI to configure the YubiKey.

Steps to reproduce

1. Download version 1.2.4 for Windows 64Bit https://developers.yubico.com/yubikey-manager-qt/Releases/
2. Install YubiKey Manager
3. Type ykman in PowerShell

Expected result ykman is not found by PowerShell. There should be an entry in windows path environment variables, so other applications are able to find the CLI.