docs: add postinstall message

Author: theogravity

.changeset/wet-wolves-agree.md

@@ -0,0 +1,6 @@
+---
+"electron-log-transport-datadog": patch
+"pino-datadog-transport": patch
+---
+
+Update maintenance message

packages/electron-log-transport-datadog/package.json

@@ -22,7 +22,8 @@
     "format": "biome format src --write && biome format test --write",
     "lint": "biome lint src && biome lint test",
     "lint:check": "biome check --apply-unsafe src && check --apply-unsafe test",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "postinstall": "echo 'This package is no longer maintained. Please visit https://loglayer.dev and use the electron-log and DataDog transports.'"
   },
   "publishConfig": {
     "access": "public"

packages/pino-datadog-transport/package.json

@@ -21,7 +21,8 @@
     "format": "biome format src --write && biome format test --write",
     "lint": "biome lint src && biome lint test",
     "lint:check": "biome check --apply-unsafe src && check --apply-unsafe test",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "postinstall": "echo 'This package is no longer maintained. Please visit https://loglayer.dev and use the pino and DataDog transports.'"
   },
   "repository": {
     "type": "git",