in Toolkit sbt example, use flat single-project style

Author: SethTisue

_includes/_markdown/install-munit.md

@@ -16,13 +16,11 @@ Alternatively, you can require just a specific version of MUnit:
 {% tab 'sbt' %}
 In your build.sbt file, you can add the dependency on toolkit-test:
 ```scala
-lazy val example = project.in(file("example"))
-  .settings(
-    scalaVersion := "3.2.2",
-    libraryDependencies += "org.scala-lang" %% "toolkit-test" % "0.1.7" % Test
-  )
+scalaVersion := "3.2.2"
+libraryDependencies += "org.scala-lang" %% "toolkit-test" % "0.1.7" % Test
 ```
-Here the `Test` configuration means that the dependency is only used by the source files in `example/src/test`.
+
+Here the `Test` configuration means that the dependency is only used by the source files in `src/test`.
 
 Alternatively, you can require just a specific version of MUnit:
 ```scala

_includes/_markdown/install-os-lib.md

@@ -15,11 +15,8 @@ Alternatively, you can require just a specific version of OS-Lib:
 {% tab 'sbt' %}
 In your `build.sbt`, you can add a dependency on the toolkit:
 ```scala
-lazy val example = project.in(file("example"))
-  .settings(
-    scalaVersion := "3.2.2",
-    libraryDependencies += "org.scala-lang" %% "toolkit" % "0.1.7"
-  )
+scalaVersion := "3.2.2"
+libraryDependencies += "org.scala-lang" %% "toolkit" % "0.1.7"
 ```
 Alternatively, you can require just a specific version of OS-Lib:
 ```scala

_includes/_markdown/install-sttp.md

@@ -15,11 +15,8 @@ Alternatively, you can require just a specific version of sttp:
 {% tab 'sbt' %}
 In your build.sbt file, you can add a dependency on the Toolkit:
 ```scala
-lazy val example = project.in(file("example"))
-  .settings(
-    scalaVersion := "3.2.2",
-    libraryDependencies += "org.scala-lang" %% "toolkit" % "0.1.7"
-  )
+scalaVersion := "3.2.2"
+libraryDependencies += "org.scala-lang" %% "toolkit" % "0.1.7
 ```
 
 Alternatively, you can require just a specific version of sttp:

_includes/_markdown/install-upickle.md

@@ -15,11 +15,8 @@ Alternatively, you can require just a specific version of UPickle:
 {% tab 'sbt' %}
 In your build.sbt file, you can add the dependency on the Toolkit:
 ```scala
-lazy val example = project.in(file("example"))
-  .settings(
-    scalaVersion := "3.2.2",
-    libraryDependencies += "org.scala-lang" %% "toolkit" % "0.1.7"
-  )
+scalaVersion := "3.2.2"
+libraryDependencies += "org.scala-lang" %% "toolkit" % "0.1.7"
 ```
 Alternatively, you can require just a specific version of UPickle:
 ```scala