FEATURE: add a pretty output to toolkit check pr (#8416)

when i write a PR, i run the tests and i like to have a pretty output to
make extra clear which one of the tests did run, which one did not, etc,
etc...

this always end up a variation of the template
> - `cargo fmt --all -- --check` to check standard code formatting
(`cargo fmt --all` applies these changes)
> - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
> - `cargo test --workspace` to check that all tests pass

but with emojis and without the descriptions

> - 🟢 `cargo fmt --all`
> - 🔴 `cargo clippy --workspace -- -D warnings -D
clippy::unwrap_used -A clippy::needless_collect`
> - 🟡 `cargo test --workspace`
>
> and a ⚫ (`⚫`) when i did not have the time
or the resources to run the check stage

in this PR, i came up with a way to do that automatically with the
`toolkit` introduced in #8152 😋

# Description
this PR
- adds `toolkit::pretty-print-command` to print the command names being
run with backticks and some colors
- adds `toolkit::report` to return a "report" of the PR check stages =>
see `help toolkit check pr`
- adds the `--pretty` option to `toolkit check pr` to return a
list-with-emojis version of the check report, i.e. a *GitHub*-friendly
list to drop in place in the "Tests + Formatting" section
- adds a clear mention to `toolkit check pr --pretty` in the PR template
to make it easily visible to anyone

hope you'll like it, that's not a huge deal but that's my attempt to
encourage developers to show that they run the tests, what stages did
pass and which one did not 😌 👋

# User-Facing Changes
the developer can now use `toolkit check pr --pretty` to have a
ready-to-use output for *GitHub*

# Tests + Formatting
```
$nothing
```

# After Submitting
```
$nothing
```

toolkit.nu

@@ -35,6 +35,50 @@ export def test [
     }
 }
 
+# print the pipe input inside backticks, dimmed and italic, as a pretty command
+def pretty-print-command [] {
+    $"`(ansi default_dimmed)(ansi default_italic)($in)(ansi reset)`"
+}
+
+# return a report about the check stage
+#
+# - fmt comes first
+# - then clippy
+# - and finally the tests
+#
+# without any option, `report` will return an empty report.
+# otherwise, the truth values will be incremental, following
+# the order above.
+def report [
+    --fail-fmt: bool
+    --fail-clippy: bool
+    --fail-test: bool
+    --no-fail: bool
+] {
+    [fmt clippy test] | wrap stage
+    | merge (
+        if $no_fail          { [true     true     true] }
+        else if $fail_fmt    { [false    $nothing $nothing] }
+        else if $fail_clippy { [true     false    $nothing] }
+        else if $fail_test   { [true     true     false] }
+        else                 { [$nothing $nothing $nothing] }
+        | wrap success
+    )
+    | upsert emoji {|it|
+        if ($it.success == $nothing) {
+            ":black_circle:"
+        } else if $it.success {
+            ":green_circle:"
+        } else {
+            ":red_circle:"
+        }
+    }
+    | each {|it|
+        $"- ($it.emoji) `toolkit ($it.stage)`"
+    }
+    | to text
+}
+
 # run all the necessary checks and tests to submit a perfect PR
 #
 # # Example
@@ -61,6 +105,9 @@ export def test [
 # >                  for val in vals {
 # > ```
 #
+# > **Note**
+# > at every stage, the `toolkit check pr` will return a report of the few stages being run.
+#
 # - we run the toolkit once and it fails...
 # ```nushell
 # >_ toolkit check pr
@@ -125,17 +172,27 @@ export def test [
 export def "check pr" [
     --fast: bool  # use the "nextext" `cargo` subcommand to speed up the tests (see [`cargo-nextest`](https://nexte.st/) and [`nextest-rs/nextest`](https://github.com/nextest-rs/nextest))
 ] {
-    print "running `toolkit fmt`"
+    print $"running ('toolkit fmt' | pretty-print-command)"
     try {
         fmt --check
     } catch {
         print $"\nplease run (ansi default_dimmed)(ansi default_italic)toolkit fmt(ansi reset) to fix the formatting"
-        return
+        return (report --fail-fmt)
     }
 
-    print "running `toolkit clippy`"
+    print $"running ('toolkit clippy' | pretty-print-command)"
+    try {
         clippy
-
-    print "running `toolkit test`"
-    if $fast { test --fast } else { test }
+    } catch {
+        return (report --fail-clippy)
+    }
+
+    print $"running ('toolkit test' | pretty-print-command)"
+    try {
+        if $fast { test --fast } else { test }
+    } catch {
+        return (report --fail-test)
+    }
+
+    report --no-fail
 }