Add ssh_config and vimrc

ssh_config

@@ -0,0 +1,9 @@
+Host *
+    ControlMaster auto
+    ControlPath ~/.ssh/control/%r@%h:%p
+    
+    # Use ServerAlive instead of TCPKeepAlive for improved stability
+    ServerAliveCountMax 3
+    ServerAliveInterval 20
+    TCPKeepAlive no
+

vimrc

@@ -0,0 +1,19 @@
+" Load sensible defaults
+runtime! vimrc_example.vim
+
+" Enable line numbers
+set number
+
+" Ignore search pattern case unless it contains uppercase letters
+set ignorecase
+set smartcase
+
+" Avoid cluttering $PWD with temporary files
+set backupdir^=~/tmp/vim//
+set directory^=~/tmp/vim//
+set undodir^=~/tmp/vim//
+
+" Indentation without hard tabs
+set expandtab
+set shiftwidth=2
+set softtabstop=2