exception safety, github actions and scalafmt

.scalafmt.conf

@@ -0,0 +1,35 @@
+version = 3.3.1
+
+runner.dialect = "scala213"
+
+maxColumn = 120
+
+align.preset = none
+
+continuationIndent {
+    defnSite = 2
+    extendSite = 2
+}
+
+rewrite {
+    rules = [
+        AvoidInfix,
+        RedundantBraces,
+        RedundantParens,
+        SortImports,
+        SortModifiers
+    ]
+
+    redundantBraces {
+        generalExpressions = yes
+        ifElseExpressions = yes
+        includeUnitMethods = yes
+        methodBodies = yes
+        parensForOneLineApply = yes
+        stringInterpolation = yes
+    }
+
+}
+
+importSelectors = singleLine
+trailingCommas = preserve