Various updates

- change to tmux in lieu of zellij
- disable obsidian nvim plugin
- add vim-ai nvim plugin
- add gitclone.sh script

nvim/lua/plugins/ai-roles.ini

@@ -0,0 +1,11 @@
+[deepthink]
+options.model = o1
+options.prompt = "You are a deeply capable reasoning being."
+
+[think]
+options.model = gpt-4o
+options.prompt = "You are a deeply capable reasoning being."
+
+[chat]
+options.model = gpt-3.5-turbo
+options.prompt = "You are a highly capable being."