[cmake, docs, tools] update CPMUtil (#3183)

Rewrote the entire tooling scheme. That's about it, just make sure
tooling works as expected everywhere.

Signed-off-by: crueter <crueter@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3183
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>

tools/cpm/package/hash.sh

@@ -0,0 +1,66 @@
+#!/bin/sh -e
+
+# SPDX-FileCopyrightText: Copyright 2025 crueter
+# SPDX-License-Identifier: LGPL-3.0-or-later
+
+RETURN=0
+
+usage() {
+	cat <<EOF
+Usage: cpmutil.sh package hash [-n|--dry-run] [-a|--all] [PACKAGE]...
+
+Check the hash of a specific package or packages.
+If a hash mismatch occurs, this script will update the package's hash.
+
+Options:
+    -n, --dry-run	Don't update the package's hash if it's a mismatch
+    -a, --all       Operate on all packages in this project.
+
+Note that this procedure will usually take a long time
+depending on the number and size of dependencies.
+
+EOF
+
+	exit $RETURN
+}
+
+while :; do
+	case "$1" in
+	-[a-z]*)
+		opt=$(printf '%s' "$1" | sed 's/^-//')
+		while [ -n "$opt" ]; do
+			# cut out first char from the optstring
+			char=$(echo "$opt" | cut -c1)
+			opt=$(echo "$opt" | cut -c2-)
+
+			case "$char" in
+			a) ALL=1 ;;
+			n) DRY=1 ;;
+			h) usage ;;
+			*) die "Invalid option -$char" ;;
+			esac
+		done
+		;;
+	--dry-run) DRY=1 ;;
+	--all) ALL=1 ;;
+	--help) usage ;;
+	"$0") break ;;
+	"") break ;;
+	*) packages="$packages $1" ;;
+	esac
+
+	shift
+done
+
+[ "$ALL" = 1 ] && packages="${LIBS:-$packages}"
+[ "$DRY" = 1 ] && UPDATE=false || UPDATE=true
+[ -z "$packages" ] && usage
+
+export UPDATE
+
+for pkg in $packages; do
+	echo "-- Package $pkg"
+	"$SCRIPTS"/util/fix-hash.sh "$pkg" || RETURN=1
+done
+
+exit $RETURN