feat: add ssh git signing config

.gitignore

@@ -1 +1,2 @@
 .dotter/cache.toml
+.idea/

gitconfig

@@ -1,20 +1,30 @@
 [user]
 	name = cătălin
     email = catalin@roboces.dev
+    signingKey = ~/.ssh/id_ed25519.pub
 
 [interactive]
     diffFilter = delta --color-only
+
 [delta]
     navigate = true
     light = false
+
 [merge]
     conflictstyle = diff3
+
 [diff]
     colorMoved = default
     external = difft
+
 [commit]
     gpgsign = true
+
 [push]
     autoSetupRemote = true
+
 [init]
     defaultBranch = main
+
+[gpg]
+    format = ssh