scripts/styleChecker.fsx: add

Add styleChecker.fsx script to check style of our F#, TS
and YML codes.

The `git respore package.json` command in the
styleChecker.fsx script was failing with the following
error, even when I was running the
`git config --global --add safe.directory '*'` command in
both the styleChecker.fsx script and in the CI. In the
[1] issue, it's suggested by someone to use --system
instead of --global in the mentioned command, when the
git command is running in a container, which solved the
problem.

```
fatal: detected dubious ownership in repository at '/__w/conventions/conventions'
To add an exception for this directory, call:

	git config --global --add safe.directory /__w/conventions/conventions

Error when running 'git restore package.json'
Fsdk.Process+ProcessFailed: Exception of type 'Fsdk.Process+ProcessFailed' was thrown.
   at Fsdk.Process.ProcessResult.Unwrap(String errMsg)
   at Fsdk.Process.ProcessResult.UnwrapDefault()
   at FSI_0002.RunPrettier(String arguments)
   at <StartupCode$FSI_0002>.$FSI_0002.main@()
Stopped due to error
Error: Process completed with exit code 1.
```

[1] actions/checkout#1048

.github/workflows/CI.yml

@@ -112,7 +112,7 @@ jobs:
           fetch-depth: 0
       # workaround for https://github.com/actions/runner/issues/2033
       - name: ownership workaround
-        run: git config --global --add safe.directory '*'
+        run: git config --system --add safe.directory '*'
       - name: Print versions
         run: |
           git --version

scripts/styleChecker.fsx

@@ -0,0 +1,99 @@
+#!/usr/bin/env -S dotnet fsi
+
+#r "nuget: Fsdk, Version=0.6.0--date20230326-0544.git-5c4f55b"
+
+open Fsdk
+open Fsdk.Process
+
+let StyleFSharpFiles() =
+    Process
+        .Execute(
+            {
+                Command = "dotnet"
+                Arguments = "new tool-manifest --force"
+            },
+            Process.Echo.Off
+        )
+        .UnwrapDefault()
+    |> ignore
+
+    Process
+        .Execute(
+            {
+                Command = "dotnet"
+                Arguments =
+                    "tool install fantomless-tool --version 4.7.997-prerelease"
+            },
+            Process.Echo.Off
+        )
+        .UnwrapDefault()
+    |> ignore
+
+    Process
+        .Execute(
+            {
+                Command = "dotnet"
+                Arguments = "fantomless --recurse ."
+            },
+            Process.Echo.Off
+        )
+        .UnwrapDefault()
+    |> ignore
+
+let RunPrettier(arguments: string) =
+    let processResult =
+        Process
+            .Execute(
+                {
+                    Command = "npx"
+                    Arguments = $"prettier {arguments}"
+                },
+                Process.Echo.All
+            )
+            .Result
+
+    match processResult with
+    | ProcessResultState.Success output -> output
+    | ProcessResultState.WarningsOrAmbiguous output -> output.StdOut
+    | ProcessResultState.Error(exitCode, output) ->
+        failwith(
+            sprintf
+                "Finished with an error of exitcode %i: %s"
+                exitCode
+                output.StdErr
+        )
+    |> printfn "%A"
+
+    // Since after installing commitlint dependencies package.json file changes, we need to
+    // run the following command to ignore package.json file
+    Process
+        .Execute(
+            {
+                Command = "git"
+                Arguments = "restore package.json"
+            },
+            Process.Echo.Off
+        )
+        .UnwrapDefault()
+    |> ignore
+
+let StyleTypeScriptFiles() =
+    RunPrettier "--quote-props=consistent --write ./**/*.ts"
+
+let StyleYmlFiles() =
+    RunPrettier "--quote-props=consistent --write ./**/*.yml"
+
+StyleFSharpFiles()
+StyleTypeScriptFiles()
+StyleYmlFiles()
+
+Process
+    .Execute(
+        {
+            Command = "git"
+            Arguments = "diff --exit-code"
+        },
+        Process.Echo.Off
+    )
+    .UnwrapDefault()
+|> ignore