Add the Around the Mountain campaign.

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1280

(cherry picked from commit 153d8e106e)

resources/campaigns/around_the_mountain.json

@@ -0,0 +1,11 @@
+{
+  "name": "Caucasus - Around The Mountain",
+  "theater": "Caucasus",
+  "authors": "Dillie",
+  "recommended_player_faction": "Russia 2010",
+  "recommended_enemy_faction": "USA 1990",
+  "description": "<p>Scenario from Russia to Georgia in two Frontlines.</p>",
+  "version": "7.0",
+  "miz": "around_the_mountain.miz",
+  "performance": 2
+}