Dedent help string in breeze configuration (apache#43555)

In Python 3.13 compiler, docstrings are automatically dedented. And
while Python 3.13 is not yet officially supported by Airflow for
some strange (and unknown) reasons, when you install breeze with
uv tools that have Python 3.13 installed, it might get into
a state that the docstrings are dedented in Breeze's bytecode and
it causes hash calculation for configuration options that have
docstring-generated help differs on different installations.

In order to make it consistent - we are now always dedenting the
help strings before hash calculation.

See python/cpython#81283

dev/breeze/doc/images/output_build-docs.txt

@@ -1 +1 @@
-03dd58933b63fc368157f716b1852e1b
+b349182dab04b6ff58acd122a403a5a4

dev/breeze/doc/images/output_prod-image.txt

@@ -1 +1 @@
-55030fe0d7718eb668fa1a37128647b0
+d91bcc76b14f186e749efe2c6aaa8682

dev/breeze/doc/images/output_prod-image_build.txt

@@ -1 +1 @@
-d0214e8e95fcb56c91e0e416690eb24f
+fe048412f9fc1527a30eaaf0a986fa16

dev/breeze/doc/images/output_setup.txt

@@ -1 +1 @@
-d4a4f1b405f912fa234ff4116068290a
+08c78d9dddd037a2ade6b751c5a22ff9

dev/breeze/doc/images/output_setup_autocomplete.txt

@@ -1 +1 @@
-fffcd49e102e09ccd69b3841a9e3ea8e
+ec3b4541a478afe5cb86a6f1c48f50f5

dev/breeze/doc/images/output_setup_config.txt

@@ -1 +1 @@
-ee2e731f011b1d93dcbfbcaebf6482a6
+235af93483ea83592052476479757683

dev/breeze/doc/images/output_start-airflow.txt

@@ -1 +1 @@
-02160e5d799a77830ac522c628e90aed
+d5d7f9a299c80596dbba0a50f2f32f1c

dev/breeze/src/airflow_breeze/commands/setup_commands.py

@@ -22,6 +22,7 @@
 import shutil
 import subprocess
 import sys
+import textwrap
 from copy import copy
 from pathlib import Path
 from typing import Any
@@ -255,8 +256,31 @@ def get_status(file: str):
     get_console().print()
 
 
-def dict_hash(dictionary: dict[str, Any]) -> str:
+def dedent_help(dictionary: dict[str, Any]) -> None:
+    """
+    Dedent help stored in the dictionary.
+
+    Python 3.13 automatically dedents docstrings retrieved from functions.
+    See https://github.com/python/cpython/issues/81283
+
+    However, click uses docstrings in the absence of help strings, and we are using click
+    command definition dictionary hash to detect changes in the command definitions, so if the
+    help strings are not dedented, the hash will change.
+
+    That's why we must de-dent all the help strings in the command definition dictionary
+    before we hash it.
+    """
+    for key, value in dictionary.items():
+        if isinstance(value, dict):
+            dedent_help(value)
+        elif key == "help" and isinstance(value, str):
+            dictionary[key] = textwrap.dedent(value)
+
+
+def dict_hash(dictionary: dict[str, Any], dedent_help_strings: bool = True) -> str:
     """MD5 hash of a dictionary. Sorted and dumped via json to account for random sequence)"""
+    if dedent_help_strings:
+        dedent_help(dictionary)
     # noinspection InsecureHash
     dhash = hashlib.md5()
     try: