Build every screen from one shared core plus a small file per board, the same firmware as before (0.2.84)

The two board profiles (5,000 lines each, 87 % the same text) become packages/core.yaml and one file per
board under packages/boards/: the hardware, a table of 84 sizes and font sizes, 18 hooks with the lines of C++
only that board adds inside a shared lambda, and the board's own sections. packages/cyd.yaml and
packages/guition.yaml keep their names and places (a screen installed from ESP Screens builds as before);
home-like-2432s028.yaml and guition-4848s040.yaml become the same entries for a checkout.

The firmware stays 0.2.70: the C++ ESPHome generates for each board, through the checkout profile and
through the GitHub package route, was compared line by line with the old profiles' (docs/TEST_RESULTS_0284.md).
tools/check_packages.py replaces tools/generate_packages.py; tools/profiles.py gives the tests and tools the
three files as one; docs/PROFILES.md says how the files fit together and how a board is added.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

tests/test_history_card.py

@@ -15,6 +15,8 @@ from pathlib import Path
 from zoneinfo import ZoneInfo
 
 ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / 'tools'))
+import profiles  # noqa: E402
 sys.path.insert(0, str(ROOT / 'screen_manager/app'))
 sys.path.insert(0, str(ROOT / 'tests'))
 import history_card as hc  # noqa: E402
@@ -397,7 +399,7 @@ class Firmware(unittest.TestCase):
                      'lv_obj_add_event_cb(area,history_scrub,LV_EVENT_ALL,nullptr);'):
             self.assertIn(flag, touch)
         for name in ('guition-4848s040.yaml', 'home-like-2432s028.yaml', 'packages/guition.yaml', 'packages/cyd.yaml'):
-            text = (ROOT / name).read_text()
+            text = profiles.text(name)
             self.assertEqual(len(re.findall(r'runtime_tiles::small_font = id\(sublabel\)->get_lv_font\(\);', text)), 1, name)