Add auto-start script

.gitignore

@@ -4,3 +4,4 @@ Cargo.lock
 **/*.rs.bk
 .vscode/
 Notes.md
+openai.sk

start.sh

@@ -0,0 +1,19 @@
+#!/bin/zsh
+
+if ! [ -f "target/release/ai_chat" ]; then
+  if ! cargo build --release; then
+    echo "Could not build binary! Press any key to exit..." >&2
+    read
+    exit
+  fi
+fi
+
+if ! [ -f "openai.sk" ]; then
+  echo -n "Enter OpenAI secret key: "
+  read -s OPENAI_SK
+else
+  OPENAI_SK="$(cat openai.sk)"
+fi
+
+export OPENAI_SK
+target/release/ai_chat