feat: updated word-bank with extended word list

- Replaced guessable words with 2309-word list from public Wordle corpus
- Replaced xenon (not in new list) with quack
- Removed duplicate zebra target, added spire
- Recalculated all 4-solver difficulty scores and replays
- 40 unique targets, all verified in guessable list

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

data/word-bank.json

@@ -9242,7 +9242,189 @@
     {
       "id": 43,
       "word": "spire",
-      "difficulty": 3.0
+      "difficulty": 4,
+      "replays": [
+        {
+          "solver": "Entropy",
+          "steps": [
+            {
+              "guess": "raise",
+              "colors": [
+                "y",
+                "x",
+                "g",
+                "y",
+                "g"
+              ]
+            },
+            {
+              "guess": "shire",
+              "colors": [
+                "g",
+                "x",
+                "g",
+                "g",
+                "g"
+              ]
+            },
+            {
+              "guess": "spire",
+              "colors": [
+                "g",
+                "g",
+                "g",
+                "g",
+                "g"
+              ]
+            }
+          ]
+        },
+        {
+          "solver": "Frequency",
+          "steps": [
+            {
+              "guess": "irate",
+              "colors": [
+                "y",
+                "y",
+                "x",
+                "x",
+                "g"
+              ]
+            },
+            {
+              "guess": "dirge",
+              "colors": [
+                "x",
+                "y",
+                "y",
+                "x",
+                "g"
+              ]
+            },
+            {
+              "guess": "shire",
+              "colors": [
+                "g",
+                "x",
+                "g",
+                "g",
+                "g"
+              ]
+            },
+            {
+              "guess": "spire",
+              "colors": [
+                "g",
+                "g",
+                "g",
+                "g",
+                "g"
+              ]
+            }
+          ]
+        },
+        {
+          "solver": "Vowel First",
+          "steps": [
+            {
+              "guess": "audio",
+              "colors": [
+                "x",
+                "x",
+                "x",
+                "y",
+                "x"
+              ]
+            },
+            {
+              "guess": "elite",
+              "colors": [
+                "x",
+                "x",
+                "g",
+                "x",
+                "g"
+              ]
+            },
+            {
+              "guess": "brine",
+              "colors": [
+                "x",
+                "y",
+                "g",
+                "x",
+                "g"
+              ]
+            },
+            {
+              "guess": "shire",
+              "colors": [
+                "g",
+                "x",
+                "g",
+                "g",
+                "g"
+              ]
+            },
+            {
+              "guess": "spire",
+              "colors": [
+                "g",
+                "g",
+                "g",
+                "g",
+                "g"
+              ]
+            }
+          ]
+        },
+        {
+          "solver": "Greedy",
+          "steps": [
+            {
+              "guess": "crane",
+              "colors": [
+                "x",
+                "y",
+                "x",
+                "x",
+                "g"
+              ]
+            },
+            {
+              "guess": "dirge",
+              "colors": [
+                "x",
+                "y",
+                "y",
+                "x",
+                "g"
+              ]
+            },
+            {
+              "guess": "shire",
+              "colors": [
+                "g",
+                "x",
+                "g",
+                "g",
+                "g"
+              ]
+            },
+            {
+              "guess": "spire",
+              "colors": [
+                "g",
+                "g",
+                "g",
+                "g",
+                "g"
+              ]
+            }
+          ]
+        }
+      ]
     }
   ]
-}
+}