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_guition.py

@@ -4,9 +4,11 @@ import re
 import sys
 import unittest
 ROOT=Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / 'tools'))
+import profiles  # noqa: E402
 sys.path.insert(0,str(ROOT/'tools'))
 import verify_gt911
-SOURCE=(ROOT/'guition-4848s040.yaml').read_text()
+SOURCE=profiles.resolved('guition-4848s040.yaml')
 VALUES=dict(re.findall(r'^  (\w+): "([^"]*)"',SOURCE,re.M))
 
 class GuitionTests(unittest.TestCase):
@@ -54,7 +56,7 @@ class GuitionTests(unittest.TestCase):
 
     def test_all_tiles_clip_long_titles(self):
         for i in range(1,11):
-            self.assertRegex(SOURCE,rf'id: t{i}_title\n\s+height: 24\n\s+width: 130\n\s+long_mode: DOT')
+            self.assertRegex(SOURCE,rf'id: !extend t{i}_title\n\s+height: 24\n\s+width: 130\n\s+long_mode: DOT')
         self.assertEqual(VALUES['AUTO_DIM_TIMEOUT'],'600')
 
     def test_gt911_verification_accepts_pixels_and_rejects_wrong_orientation(self):