other(dev): Add VSCode extension settings, recommendations

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+  "recommendations": ["justarandomgeek.factoriomod-debug", "sumneko.lua"]
+}

.vscode/settings.json

@@ -1,3 +1,26 @@
 {
-  "cSpell.words": ["Factorio"]
+  "cSpell.words": ["conventionalcommits", "Factorio"],
+  "Lua.diagnostics.globals": [
+    "game",
+    "settings",
+    "script",
+    "storage",
+    "prototypes",
+    "entity",
+    "defines",
+    "data",
+    "rendering",
+    "mods",
+    "log",
+    "util",
+    "table",
+    "serpent",
+    "table_size",
+    "commands",
+    "remote",
+    "__DebugAdapter",
+    "__Profiler"
+  ],
+  "Lua.diagnostics.disable": ["lowercase-global"],
+  "Lua.runtime.version": "Lua 5.2"
 }