Improve instructions for getting game logs and install logs

The current instructions for getting game/install logs have a whole bunch of ways you can get the install logs/game logs.

- https://07th-mod.com/wiki/Higurashi/support/

It would be better if there were one main way (or one way per each operating system), and all the alternative options show in a pop up section. Probably boiling down to "run the installer, then click this button".

Some installer changes may be necessary though - to get the installer logs .zip file, there should be a button always available at the top of the page, and also a button on the Troubleshooting page.

It would also be good if the install log zip could dump the game log of all detected games (the Troubleshooting page already detects all installed games, so should be able to reuse that logic)

Review the current support wiki page at https://07th-mod.com/wiki/Higurashi/support/ to understand the existing log collection methods. Examine the installer's UI code for adding a log export button, likely in the frontend components. Check the Troubleshooting page logic that detects installed games to reuse for gathering logs. The goal is to simplify instructions to one primary method per OS and ensure the installer can export logs via a button.

Written by the indexing model from the issue text.