Beef up how qmk doctor works. (#7375)

* Beef up how `qmk doctor` works.

* improve the `git submodule status` parsing. h/t @erovia

* Fix whitespace and imports

* yapf

* Add documentation for the new doctor functionality

* Replace type_unchanged() with str()

* remove unused modules

* Update lib/python/qmk/cli/doctor.py

Co-Authored-By: Erovia <Erovia@users.noreply.github.com>

Co-authored-by: Erovia <Erovia@users.noreply.github.com>

lib/python/qmk/questions.py

@@ -0,0 +1,97 @@
+"""Functions to collect user input.
+"""
+
+from milc import cli, format_ansi
+
+
+def yesno(prompt, *args, default=None, **kwargs):
+    """Displays prompt to the user and gets a yes or no response.
+
+    Returns True for a yes and False for a no.
+
+    If you add `--yes` and `--no` arguments to your program the user can answer questions by passing command line flags.
+
+        @add_argument('-y', '--yes', action='store_true', arg_only=True, help='Answer yes to all questions.')
+        @add_argument('-n', '--no', action='store_true', arg_only=True, help='Answer no to all questions.')
+
+    Arguments:
+        prompt
+            The prompt to present to the user. Can include ANSI and format strings like milc's `cli.print()`.
+
+        default
+            Whether to default to a Yes or No when the user presses enter.
+
+            None- force the user to enter Y or N
+
+            True- Default to yes
+
+            False- Default to no
+    """
+    if not args and kwargs:
+        args = kwargs
+
+    if 'no' in cli.args and cli.args.no:
+        return False
+
+    if 'yes' in cli.args and cli.args.yes:
+        return True
+
+    if default is not None:
+        if default:
+            prompt = prompt + ' [Y/n] '
+        else:
+            prompt = prompt + ' [y/N] '
+
+    while True:
+        print()
+        answer = input(format_ansi(prompt % args))
+        print()
+
+        if not answer and prompt is not None:
+            return default
+
+        elif answer.lower() in ['y', 'yes']:
+            return True
+
+        elif answer.lower() in ['n', 'no']:
+            return False
+
+
+def question(prompt, *args, default=None, confirm=False, answer_type=str, **kwargs):
+    """Prompt the user to answer a question with a free-form input.
+
+        prompt
+            The prompt to present to the user. Can include ANSI and format strings like milc's `cli.print()`.
+
+        default
+            The value to return when the user doesn't enter any value. Use None to prompt until they enter a value.
+
+        answer_type
+            Specify a type function for the answer. Will re-prompt the user if the function raises any errors. Common choices here include int, float, and decimal.Decimal.
+    """
+    if not args and kwargs:
+        args = kwargs
+
+    if default is not None:
+        prompt = '%s [%s] ' % (prompt, default)
+
+    while True:
+        print()
+        answer = input(format_ansi(prompt % args))
+        print()
+
+        if answer:
+            if confirm:
+                if yesno('Is the answer "%s" correct?', answer, default=True):
+                    try:
+                        return answer_type(answer)
+                    except Exception as e:
+                        cli.log.error('Could not convert answer (%s) to type %s: %s', answer, answer_type.__name__, str(e))
+            else:
+                try:
+                    return answer_type(answer)
+                except Exception as e:
+                    cli.log.error('Could not convert answer (%s) to type %s: %s', answer, answer_type.__name__, str(e))
+
+        elif default is not None:
+            return default