Simplify state persistence

Use use local ./data directory instead of
XDG directories.

opencode.aliases

@@ -1,19 +1,9 @@
 OPENCODE_CONTAINER_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" && pwd)"
 
 opencode() {
-    # Set defaults if not already defined
-    : "${XDG_DATA_HOME:=$HOME/.local/share}"
-    : "${XDG_CONFIG_HOME:=$HOME/.config}"
-    : "${XDG_STATE_HOME:=$HOME/.local/state}"
-    : "${XDG_CACHE_HOME:=$HOME/.cache}"
-
     UID=$(id -u) \
     GID=$(id -g) \
     USER=$(whoami) \
-    XDG_DATA_HOME="$XDG_DATA_HOME" \
-    XDG_CONFIG_HOME="$XDG_CONFIG_HOME" \
-    XDG_STATE_HOME="$XDG_STATE_HOME" \
-    XDG_CACHE_HOME="$XDG_CACHE_HOME" \
     docker compose \
         -f "$OPENCODE_CONTAINER_DIR/docker-compose.yaml" \
         run --rm \