Fix add exercise script (#1283)

* Add basic version of script

* Create template dir

.github/ISSUE_TEMPLATE/new_exercise.md

@@ -1,6 +1,6 @@
 There is a new exercise, [EXERCISE-NAME](https://github.com/exercism/problem-specifications/blob/master/exercises/EXERCISE-NAME/description.md), which data can be found here: https://github.com/exercism/problem-specifications/tree/master/exercises/EXERCISE-NAME
 
-To implement the `EXERCISE-NAME` exercise, first run the `./add-new-exercise EXERCISE-NAME` script that will create and update the files required for the new exercise. After this script has run, it will have done the following:
+To implement the `EXERCISE-NAME` exercise, first run the `./add-practice-exercise EXERCISE-NAME` script that will create and update the files required for the new exercise. After this script has run, it will have done the following:
 
 - Added a new entry for the exercise to the [config.json](https://github.com/exercism/fsharp/blob/master/config.json) file.
 - Add a default generator to the [generator/Generators.fs] file, which is used to automatically convert the [canonical data](https://github.com/exercism/problem-specifications/blob/master/exercises/EXERCISE-NAME/canonical-data.json) to a test file. For more information on how this works, check the [generators docs](https://github.com/exercism/fsharp/blob/master/docs/GENERATORS.md).

.gitignore

@@ -1,5 +1,3 @@
-!bin/fetch-configlet
-!bin/fetch-configlet.ps1
 bin/
 build/
 obj/
@@ -17,3 +15,5 @@ paket-files
 *.DotSettings.user
 BenchmarkDotNet.Artifacts/
 BenchmarkDotNet.Bin/
+!/bin
+/bin/configlet

add-practice-exercise.ps1

@@ -0,0 +1,67 @@
+<#
+.SYNOPSIS
+    Add a new exercise.
+.DESCRIPTION
+    Add the files need to add a new exercise.
+.PARAMETER Exercise
+    The slug of the exercise to add.
+.PARAMETER Author
+    The author of the exercise.
+.PARAMETER Difficulty
+    The difficulty of the exercise on a scale from 1 to 10 (optional, default: 1).
+.EXAMPLE
+    The example below will add the "acronym" exercise
+    PS C:\> ./add-practice-exercise.ps1 acronym
+#>
+
+[CmdletBinding(SupportsShouldProcess)]
+param (
+    [Parameter(Position = 0, Mandatory = $true)][string]$Exercise,
+    [Parameter(Mandatory = $true)][string]$Author,
+    [Parameter()][int]$Difficulty = 1
+)
+
+$ErrorActionPreference = "Stop"
+$PSNativeCommandUseErrorActionPreference = $true
+
+# Use configlet to create the exercise
+& bin/fetch-configlet
+& bin/configlet create --practice-exercise $Exercise --difficulty $Difficulty --author $Author
+
+# Create project
+$exerciseName = (Get-Culture).TextInfo.ToTitleCase($Exercise).Replace("-", "")
+$exerciseDir = "exercises/practice/${Exercise}"
+$project = "${exerciseDir}/${ExerciseName}.fsproj"
+& dotnet new xunit --force -lang "F#" --target-framework-override net8.0 -o $exerciseDir -n $ExerciseName
+& dotnet sln exercises/Exercises.sln add $project
+
+# Update project packages
+& dotnet remove $project package coverlet.collector
+& dotnet add $project package Exercism.Tests --version 0.1.0-beta1
+& dotnet add $project package xunit.runner.visualstudio --version 2.4.3
+& dotnet add $project package xunit --version 2.4.1
+& dotnet add $project package Microsoft.NET.Test.Sdk --version 16.8.3
+
+# Add tools
+& dotnet new tool-manifest -o $exerciseDir
+& dotnet tool install --tool-manifest "${exerciseDir}/.config/dotnet-tools.json" fantomas-tool
+
+# Remove and update files
+Remove-Item -Path "${exerciseDir}/Program.fs"
+Remove-Item -Path "${exerciseDir}/Tests.fs"
+Set-Content -Path "${exerciseDir}/${exerciseName}.fs" -Value "module ${exerciseName}"
+Set-Content -Path "${exerciseDir}/.meta/Example.fs" -Value "module ${exerciseName}"
+
+# Fix the includes
+[xml]$proj = Get-Content $project
+$proj.Project.ItemGroup[0].Compile[0].Include = "${exerciseName}.fs"
+$proj.Project.ItemGroup[0].Compile[1].Include = "${exerciseName}Tests.fs"
+$proj.Save($project)
+
+# Add and run generator (this will update the tests file)
+Add-Content -Path generators/Generators.fs -Value @"
+
+type ${exerciseName}() =
+    inherit ExerciseGenerator()
+"@
+& dotnet run --project generators --exercise $Exercise