Track read_only per project and buffer

This uses a new enum to avoid confusing booleans

script/sqlx

@@ -8,7 +8,7 @@ set -e
 cd crates/collab
 
 # Export contents of .env.toml
-eval "$(cargo run --quiet --bin dotenv)"
+eval "$(cargo run --quiet --bin dotenv2)"
 
 # Run sqlx command
 sqlx $@