Add cmake preset support

CMakePresets.json

+{
+    "version": 1,
+    "configurePresets": [
+        {
+            "name": "dev",
+            "displayName": "Build as debug",
+            "generator": "Ninja",
+            "binaryDir": "${sourceDir}/build",
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "Debug",
+		"CMAKE_EXPORT_COMPILE_COMMANDS": "ON"
+            }
+        },
+        {
+            "name": "asan",
+            "displayName": "Build with Asan support.",
+            "generator": "Ninja",
+            "binaryDir": "${sourceDir}/build-asan",
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "Debug",
+                "ECM_ENABLE_SANITIZERS" : "'address;undefined'",
+		"CMAKE_EXPORT_COMPILE_COMMANDS": "ON"
+            }
+        },
+        {
+            "name": "unity",
+            "displayName": "Build with CMake unity support.",
+            "generator": "Ninja",
+            "binaryDir": "${sourceDir}/build-unity",
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "Debug",
+		"CMAKE_UNITY_BUILD": "ON",
+		"CMAKE_EXPORT_COMPILE_COMMANDS": "ON"
+            }
+        },
+        {
+            "name": "release",
+            "displayName": "Build as release mode.",
+            "generator": "Ninja",
+            "binaryDir": "${sourceDir}/build-release",
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "Release"
+            }
+        },
+        {
+            "name": "profile",
+            "displayName": "profile",
+            "generator": "Ninja",
+            "binaryDir": "${sourceDir}/build-profile",
+            "cacheVariables": {
+                "CMAKE_BUILD_TYPE": "RelWithDebInfo",
+		"CMAKE_EXPORT_COMPILE_COMMANDS": "ON"
+            }
+	}
+    ]
+}

CMakePresets.json.license

+# SPDX-FileCopyrightText: 2021 Laurent Montel <montel@kde.org>
+# SPDX-License-Identifier: BSD-3-Clause