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_binary_words.py

@@ -10,6 +10,8 @@ import unittest
 from pathlib import Path
 
 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'))
 import header_bar  # noqa: E402
 import history_card  # noqa: E402
@@ -62,7 +64,7 @@ class BinaryWords(unittest.TestCase):
         letters = set(''.join(on + off for on, off in header_bar.BINARY_STATES.values()))
         self.assertLessEqual(letters, set(header_bar.GLYPHS))
         for name in PROFILES:
-            text = (ROOT / name).read_text()
+            text = profiles.resolved(name)
             for font in ('headline', 'watch_value', 'label', 'sublabel', 'sublabel_big'):
                 block = re.search(r'id: ' + font + r'\n    size: \d+\n    bpp: 4\n    glyphs: \[(.*?)\]\n', text, re.S)
                 self.assertIsNotNone(block, (name, font))