D2LFG - Destiny 2 Steam Overlay Performance Fix

WHAT THIS IS
A small community-workaround launcher for the Steam version of Destiny 2.
It removes seven known Steam overlay files from the Steam root folder for the
current Steam session, then opens Destiny 2 through Steam.

WHY
The workaround was posted by Dragwind in the Destiny 2 Steam Discussions.
Community reports in the same thread indicate it improves performance for some
configurations. It is not guaranteed and is not an official Bungie or Valve fix.

SOURCE DISCUSSION
https://steamcommunity.com/app/1085660/discussions/0/573795107743178114/?tscn=1785362581#c583929293210393898

HOW TO USE
1. If you already launched a game this Steam session, fully exit Steam.
2. Start Steam normally. Do NOT launch a game yet.
3. Run D2LFG-Destiny2-Steam-Overlay-Fix.bat.
4. The script removes the known overlay files and launches Destiny 2.

Steam normally restores missing overlay files after Steam is restarted, so the
workaround may need to be run again on later Steam sessions.

SAFETY
The BAT source is visible in plain text. It does not download or run remote code.
It targets only the seven filenames listed on the D2LFG page in Steam's root
folder. If a file is locked, it stops instead of pretending the cleanup worked.
