CMakeLists.txt, .vscode: enable cmake compile_commands.json and add VSCode configuration

.vscode/c_cpp_properties.json

@@ -0,0 +1,17 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [],
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c17",
+            "cppStandard": "gnu++17",
+            "intelliSenseMode": "linux-gcc-x64",
+            "compileCommands": "${workspaceFolder}/build/compile_commands.json"
+        }
+    ],
+    "version": 4
+}

.vscode/settings.json

@@ -0,0 +1,9 @@
+{
+    "cmake.configureOnOpen": true,
+    "files.associations": {
+        "iostream": "cpp",
+        "vector": "cpp",
+        "string": "cpp",
+        "format": "cpp"
+    }
+}

CMakeLists.txt

@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 3.10.0 FATAL_ERROR)
 
 project(distromatic)
 
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
 set(LOCALEDIR "${CMAKE_INSTALL_PREFIX}/share/locale")
 
 if (NOT SYSCONF_INSTALL_DIR)