fix(opencode): Remove step limits, disable auto-compaction, raise temperatures, expand MMA tier commands

- Remove steps limits from all 6 agent files
- Disable auto-compaction (auto: false, prune: false)
- Raise temperatures (tier1: 0.5, tier2: 0.4, tier3: 0.3, tier4: 0.2, general: 0.3, explore: 0.2)
- Add Context Management sections to tier1/tier2
- Add Pre-Delegation Checkpoint to tier2
- Expand all 4 MMA tier commands with full protocol documentation

opencode.json

@@ -57,8 +57,8 @@
   "share": "manual",
   "autoupdate": true,
   "compaction": {
-    "auto": true,
-    "prune": true,
+    "auto": false,
+    "prune": false,
     "reserved": 10000
   },
   "watcher": {