Drop id -u root check from run_once scripts

chezmoi runs run_once_* scripts as the invoking user (uid != 0).
The earlier check [[ $(id -u) -ne 0 ]] && die ... killed the script
immediately when invoked via 'chezmoi apply' or 'chezmoi init --apply'
from a normal user session.

The scripts use sudo internally for package operations (pacman/apt),
so elevation happens correctly. The id -u check was wrong: it belongs
in a script that's *meant* to be invoked as root directly, not in a
chezmoi-managed script.

run_once_00-install-bootstrap-tools.sh.tmpl

@@ -9,7 +9,9 @@ set -euo pipefail
 log() { printf '\033[1;34m[bootstrap]\033[0m %s\n' "$*"; }
 die() { printf '\033[1;31m[bootstrap ERROR]\033[0m %s\n' "$*" >&2; exit 1; }
 
-[[ "$(id -u)" -ne 0 ]] && die "must run as root or via sudo"
+# This script runs as the invoking user via `chezmoi apply`/`init`. It uses
+# sudo for system package installs. If sudo isn't passwordless, the user
+# will be prompted once per sudo invocation.
 
 {{ if eq .os_family "arch" -}}
 log "pacman-sync"

run_once_10-add-chaotic-aur.sh.tmpl

@@ -14,7 +14,8 @@ set -euo pipefail
 log() { printf '\033[1;34m[chaotic]\033[0m %s\n' "$*"; }
 die() { printf '\033[1;31m[chaotic ERROR]\033[0m %s\n' "$*" >&2; exit 1; }
 
-[[ "$(id -u)" -ne 0 ]] && die "must run as root or via sudo"
+# This script runs as the invoking user; sudo handles elevation for pacman
+# and pacman-key operations below.
 
 if command -v paru >/dev/null 2>&1; then
     log "paru already installed — skipping chaotic setup"