Add sbt-tpolecat

- And fix some warnings

build.sbt

@@ -18,5 +18,7 @@ lazy val root = (project in file("."))
       "org.typelevel" %% "cats-effect-std" % "3.5.4",
       "org.typelevel" %% "cats-effect-testing-specs2" % "1.5.0" % Test,
       "org.typelevel" %% "munit-cats-effect-3" % "1.0.7" % Test
-    )
+    ),
+    // Add sbt plugins here, so that scala steward updates them in the g8 template
+    addSbtPlugin("org.typelevel" % "sbt-tpolecat" % "0.5.1"),
   )

src/main/g8/build.sbt

@@ -1,5 +1,8 @@
+import org.typelevel.sbt.tpolecat.*
+
 ThisBuild / organization := "com.example"
 ThisBuild / scalaVersion := $if(scala3.truthy)$"3.4.0"$else$"2.13.13"$endif$
+ThisBuild / tpolecatDefaultOptionsMode := VerboseMode;
 
 lazy val root = (project in file(".")).settings(
   name := "$name;format="norm"$",
@@ -15,6 +18,5 @@ lazy val root = (project in file(".")).settings(
     compilerPlugin("com.olegpy" %% "better-monadic-for" % "0.3.1")$endif$$if(testlib-use-cats-effect-testing-specs2.truthy)$,
     "org.typelevel" %% "cats-effect-testing-specs2" % "1.5.0" % Test$else$$endif$$if(testlib-use-munit-cats-effect-3.truthy)$,
     "org.typelevel" %% "munit-cats-effect-3" % "1.0.7" % Test$else$$endif$
-
   )
 )

src/main/g8/project/plugins.sbt

@@ -0,0 +1 @@
+addSbtPlugin("org.typelevel" % "sbt-tpolecat" % "0.5.1")

src/main/g8/src/test/scala/$package$/$if(testlib-use-munit-cats-effect-3.truthy)$.$endif$/HelloWorldSuite.scala

@@ -1,6 +1,5 @@
 package $package$
 
-import cats.effect.{IO, SyncIO}
 import munit.CatsEffectSuite
 
 class HelloWorldSuite extends CatsEffectSuite {