Add vscode LSP support

.vscode/c_cpp_properties.json

@@ -0,0 +1,15 @@
+{
+    "configurations": [
+      {
+        "name": "Linux",
+        "includePath": [
+          "${workspaceFolder}/**",
+          "${env:C_INCLUDE_PATH}"
+        ],
+        "defines": [],
+        "cStandard": "c11",
+        "intelliSenseMode": "linux-gcc-x64"
+      }
+    ],
+    "version": 4
+  }

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "files.associations": {
+        "*.h": "c"
+    }
+}