chore: upgrade pi dependencies from @mariozechner 0.72.0 to @earendil-works 0.75.5

pi 0.75.5 renamed the npm namespace from @mariozechner/ to @earendil-works/.
Importing from the old namespace causes 'fetch failed' errors at startup.

Changes:
- index.ts: @mariozechner/pi-ai → @earendil-works/pi-ai
- index.ts: @mariozechner/pi-coding-agent → @earendil-works/pi-coding-agent
- package.json: bump deps from 0.72.0 to 0.75.5
- package-lock.json: regenerated with new packages (242 deps)
- tsc --noEmit: zero errors

index.ts

@@ -12,8 +12,8 @@
  * Models are fetched from Command Code's Provider API at startup.
  */
 
-import { calculateCost, createAssistantMessageEventStream } from "@mariozechner/pi-ai"
-import type { ExtensionAPI } from "@mariozechner/pi-coding-agent"
+import { calculateCost, createAssistantMessageEventStream } from "@earendil-works/pi-ai"
+import type { ExtensionAPI } from "@earendil-works/pi-coding-agent"
 
 import { COMMAND_CODE_CLI_VERSION, createStreamCommandCode, DEFAULT_API_BASE } from "./src/core.ts"
 import { DEFAULT_MODELS_URL, fetchCommandCodeModels } from "./src/models.ts"

package.json

@@ -47,13 +47,13 @@
     ]
   },
   "devDependencies": {
-    "@mariozechner/pi-coding-agent": "0.72.0",
+    "@earendil-works/pi-coding-agent": "0.75.5",
     "@types/node": "25.6.0",
     "prettier": "^3.5.0",
     "tsx": "4.21.0",
     "typescript": "6.0.3"
   },
   "dependencies": {
-    "@mariozechner/pi-ai": "0.72.0"
+    "@earendil-works/pi-ai": "0.75.5"
   }
 }