feat: Phase 4 port Oracle, Meaning, UNE, and Dice

Ports the four core Mythic GME tools from reference/index.html into
the modular structure. Fate Check and Random Event Check preserve
the exact probability matrix and roll logic, now reading chaos
factor live from the active campaign instead of local state. Meaning
and UNE tables are served from data/tables/ via a new tables route.
UNE motivation uses the published verb+noun tables instead of the
reference's flattened phrase list. Dice (pool builder, custom roll,
percentile, ability score) is ported verbatim as pure frontend logic.

data/tables/une-character.json

@@ -0,0 +1,14 @@
+{
+  "name": "UNE Character",
+  "entries": [
+    "A betrayed idealist", "A burned-out soldier", "A charlatan with a conscience",
+    "A desperate parent", "A disgraced noble", "A disillusioned priest", "A failed hero",
+    "A fallen guardian", "A fanatic true believer", "A hardened survivor", "A haunted veteran",
+    "A hidden manipulator", "A jaded mercenary", "A loyal servant", "A opportunistic thief",
+    "A principled outlaw", "A reluctant leader", "A ruthless pragmatist", "A scarred wanderer",
+    "A scholar obsessed", "A secret keeper", "A self-made merchant", "A shattered idealist",
+    "A struggling reformer", "A tortured artist", "A true believer", "A vengeful survivor",
+    "A weary traveler", "A willful contrarian", "An ambitious upstart", "An ancient relic",
+    "An unlikely prophet", "Someone hiding grief", "Someone hiding guilt", "Someone seeking peace"
+  ]
+}