Replace docker compose with persistent per-project lifecycle

Move from docker compose run to a Python-managed container lifecycle.
Each project now gets a dedicated container that is started on demand
and stopped when opencode exits, instead of being recreated each time.

Use a shared home directory across projects so configurations presist.

The container are not destroyed, so tools and caches can be installed
specifically for a project by opencode itself once and reused, while
still avoiding long-running containers.

opencode.aliases

@@ -1,17 +1,5 @@
 OPENCODE_CONTAINER_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" && pwd)"
 
 opencode() {
-    local uid=$(id -u)
-    local gid=$(id -g)
-    local user=$(whoami)
-    UID="$uid" \
-    GID="$gid" \
-    USER="$user" \
-    CONTAINER_HOME="$OPENCODE_CONTAINER_DIR/container-home" \
-    docker compose \
-        -f "$OPENCODE_CONTAINER_DIR/docker-compose.yaml" \
-        run --rm \
-        -u "$uid:$gid" \
-        opencode opencode "$@" \
-        2> >(grep -v "No services to build" >&2)
+    python3 "$OPENCODE_CONTAINER_DIR/opencode-container.py" "$@"
 }