[Feature] Add devcontainer support (#4294)

* Add devcontainer support

* Rename default values for eqemu_config

* Move devcontainer files to devcontainer

.vscode/c_cpp_properties.json

@@ -0,0 +1,23 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${default}",
+                "${workspaceFolder}/submodules/fmt/include",
+                "${workspaceFolder}/submodules/cereal/include",
+                "${workspaceFolder}/submodules/glm",
+                "${workspaceFolder}/submodules/libuv/include"
+            ],
+            "defines": [
+                "LUA_EQEMU=1"
+            ],
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c17",
+            "cppStandard": "gnu++17",
+            "intelliSenseMode": "linux-gcc-x64",
+            "configurationProvider": "ms-vscode.cmake-tools"
+        }
+    ],
+    "version": 4
+}