fix: update README for marketplace installation and improve hooks_cli file encoding

.claude-plugin/README.md

@@ -11,13 +11,8 @@ A Claude Code plugin that gives your AI a persistent memory system. Mine project
 ### Claude Code Marketplace
 
 ```bash
-claude plugin add mempalace
-```
-
-### Git
-
-```bash
-claude plugin add --git https://github.com/milla-jovovich/mempalace
+claude plugin marketplace add milla-jovovich/mempalace
+claude plugin install --scope user mempalace
 ```
 
 ### Local Clone

mempalace/hooks_cli.py

@@ -46,7 +46,7 @@ def _count_human_messages(transcript_path: str) -> int:
         return 0
     count = 0
     try:
-        with open(path) as f:
+        with open(path, encoding="utf-8", errors="replace") as f:
             for line in f:
                 try:
                     entry = json.loads(line)