Remove GPG configuration from Git tracking

- Add .gpg/ to .gitignore to keep GPG config local only
- Remove previously tracked GPG files from repository
- GPG configuration remains functional locally

.gitignore

@@ -1 +1,4 @@
 .vscode/settings.json
+
+# GPG configuration (local only)
+.gpg/

.gpg/gpg-agent.conf

@@ -1,10 +0,0 @@
-# GPG Agent Configuration - Weekly renewal with monthly maximum
-# Ask for passphrase every week (604800 seconds = 7 days)
-default-cache-ttl 604800
-# Maximum cache time is 1 month (2592000 seconds = 30 days)
-max-cache-ttl 2592000
-# Same settings for SSH keys
-default-cache-ttl-ssh 604800
-max-cache-ttl-ssh 2592000
-# Enable passphrase confirmation
-allow-preset-passphrase