chore: update devcontainer configuration and add setup scripts

.devcontainer/onCreateCommand.d/01-configure-zsh

@@ -0,0 +1,36 @@
+#!/bin/zsh -eu
+
+TARGET_USER="usr_vscode"
+if [[ "$EUID" -eq 0 ]]; then
+  target_home="/home/${TARGET_USER}"
+else
+  target_home="$HOME"
+fi
+
+zshrc="${target_home}/.zshrc"
+mkdir -p "${zshrc:h}"
+touch "$zshrc"
+
+vscode_marker='if [[ "$TERM_PROGRAM" == "vscode" ]]; then'
+if ! grep -Fq "$vscode_marker" "$zshrc" 2>/dev/null; then
+  cat <<'EOF' >>"$zshrc"
+
+if [[ "$TERM_PROGRAM" == "vscode" ]]; then
+    local vscode_executable
+    if command -v code >/dev/null 2>&1; then
+        vscode_executable="code"
+    elif command -v code-insiders >/dev/null 2>&1; then
+        vscode_executable="code-insiders"
+    fi
+
+    if [ -n "$vscode_executable" ]; then
+        . "$($vscode_executable --locate-shell-integration-path zsh)"
+    fi
+fi
+EOF
+fi
+
+alias_snippet="alias clean-node-modules='setopt rm_star_silent; rm -rf node_modules/.*; rm -rf node_modules/*'; unsetopt rm_star_silent"
+if ! grep -Fqx -- "$alias_snippet" "$zshrc" 2>/dev/null; then
+  printf '\n%s\n' "$alias_snippet" >>"$zshrc"
+fi