Update .gitignore to allow specific directories and files for client and server while ignoring everything else in the instance root

.gitignore

@@ -1,7 +1,39 @@
-saves/
-Server/world/
-Server/logs/
-Server/eula.txt
-options.txt
-logs/
-Server/crash-reports/
+# Whitelist-only: игнорируем всё в корне инстанса, кроме перечисленного ниже
+/*
+
+!.gitignore
+
+# --- Клиент (корень инстанса) ---
+!/config/
+!/mods/
+!/resourcepacks/
+!/shaderpacks/
+
+!/manifest.json
+!/minecraftinstance.json
+!/modlist.html
+!/PupaMLupa.json
+!/TLauncherAdditional.json
+!/.curseclient
+
+!/config/**
+!/mods/**
+!/resourcepacks/**
+!/shaderpacks/**
+
+# --- Сервер ---
+!/Server/
+
+/Server/*
+!/Server/config/
+!/Server/mods/
+!/Server/install_java.ps1
+!/Server/install_java.sh
+!/Server/start.bat
+!/Server/start.ps1
+!/Server/start.sh
+!/Server/variables.txt
+!/Server/manifest.json
+
+!/Server/config/**
+!/Server/mods/**