build: add SonarCloud config

.sonarcloud.properties

@@ -0,0 +1,21 @@
+# Path to sources
+sonar.sources=\
+  src/
+
+sonar.exclusions=\
+  src/fft-api/types/typescript-fetch-client/**
+
+sonar.inclusions=\
+  src/**/*.ts
+
+# Path to tests
+sonar.tests=\
+  src/
+
+# sonar.test.exclusions=
+
+sonar.test.inclusions=\
+  src/**/*.test.ts
+
+# Source encoding
+# sonar.sourceEncoding=