fix(spells): set the correct area shapes

SRD-verified area templates: Burning Hands 15-ft cone, Color Spray 15-ft cone, Fear 30-ft cone, Flurry of Snowballs 30-ft cone, Lightning Bolt 120-ft line (all converted from single-target/burst approximations to proper AreaEffect shapes); Fireball 20-ft burst, Sound Burst 10-ft spread, Sleep 10-ft burst, Web 20-ft spread kept. Close-range spells note the 15/30-ft RAW ranges as an approximation in their descriptions. README: cone/scaling limitations moved out of the limitations list, new area-shape + caster-level scaling rules documented, areas.py added to the architecture.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

data/spells/fear.json

@@ -2,17 +2,25 @@
   "name": "Fear",
   "level": 4,
   "school": "necromancy",
-  "range": "medium",
+  "range": "close",
   "save": "will",
   "base_dc": 10,
   "cast_time": "standard",
   "effects": [
     {
-      "type": "condition",
-      "condition_name": "panicked",
-      "duration_rounds": 4,
-      "save_negates": true
+      "type": "area",
+      "shape": "cone",
+      "radius_ft": 30,
+      "save_for_half": false,
+      "effects": [
+        {
+          "type": "condition",
+          "condition_name": "panicked",
+          "duration_rounds": 4,
+          "save_negates": true
+        }
+      ]
     }
   ],
-  "description": "SRD spells/fear.md: each living creature in the 30-ft. cone becomes panicked unless it succeeds on a Will save (a successful save makes it shaken for 1 round instead). Modeled as panicked for 4 rounds on a failed save; the shaken-on-success partial needs partial-save support and the cone template is absent - both documented limitations."
+  "description": "SRD spells/fear.md: each living creature in the 30-ft. cone becomes panicked unless it succeeds on a Will save (a successful save makes it shaken for 1 round instead). Modeled as panicked for 4 rounds on a failed save; the shaken-on-success partial needs partial-save support (documented limitation). The SRD range is 30 ft. - modeled as the closest category (close)."
 }