fix: rank a console first for its own name

The PlayStation 2 page holds every word of "playstation bios" and pagefind ignores the words a page has that the query lacks, so its own body matches put it first. A console whose every word another system page's consoles also hold is now written again in an `exact` field (weight 20). File names reach the `files` field as their parts: whole names let "ds" reach twelve dsi_* names on the DSi page. `consoles` weighs 100 so an emulator named after its console (Saturn.emu) comes second, and `aliases` 10 so the Nintendo page keeps "gba bios". The gate runs both directions of the PlayStation, Game Boy, DS and Wii pairs and Saturn.

tests/test_site_r4_components.py

@@ -214,8 +214,8 @@ class SearchFields(unittest.TestCase):
 
     def test_declared_and_never_shown(self):
         config = _read(CONFIG)
-        self.assertIn("metaWeights: { title: 10, files: 0.5, aliases: 5, devices: 5, consoles: 10, terms: 30 },", config)
-        self.assertIn("const UNSHOWN_FIELDS = new Set(['files', 'aliases', 'devices', 'consoles', 'terms']);", _read(SITE_TS))
+        self.assertIn("metaWeights: { title: 10, files: 0.5, aliases: 10, devices: 5, consoles: 100, exact: 20, terms: 30 },", config)
+        self.assertIn("const UNSHOWN_FIELDS = new Set(['files', 'aliases', 'devices', 'consoles', 'exact', 'terms']);", _read(SITE_TS))
 
 
 class SearchLoadsOnFirstUse(unittest.TestCase):