fix(opencode): install plugin SDK at runtime (#2574)

The OpenCode plugin imports @opencode-ai/plugin/tool from its
built dist entrypoint, so the package must be present in
OpenCode's isolated plugin cache. Keeping it only as a peer
dependency lets npm skip it during plugin installation, which can
make the plugin fail to load with ERR_MODULE_NOT_FOUND.

Move @opencode-ai/plugin into dependencies and remove the
peer-only declaration. Keep @vectorize-io/hindsight-client as a
runtime dependency, and sync package-lock.json so npm installs the
cache tree needed by OpenCode.

Verified with npm run build, npm pack --json, and a local opencode
plugin install from the generated tarball. The generated cache
contained both runtime dependencies and direct import of the
plugin entrypoint succeeded.

Author: Sanderhoff-alt

hindsight-integrations/opencode/package-lock.json

@@ -41,14 +41,11 @@
     "test:e2e": "HINDSIGHT_LIVE_E2E=1 vitest run",
     "prepublishOnly": "npm run clean && npm run build"
   },
-  "peerDependencies": {
-    "@opencode-ai/plugin": ">=1.0.0"
-  },
   "dependencies": {
+    "@opencode-ai/plugin": "^1.3.13",
     "@vectorize-io/hindsight-client": "^0.4.19"
   },
   "devDependencies": {
-    "@opencode-ai/plugin": "^1.3.13",
     "@types/node": "^22.0.0",
     "tsup": "^8.5.1",
     "typescript": "^5.7.0",