Address ranges in address match lists (IPv4 and IPv6)

ACLs, views' match lists, options with address match lists and blocking
client groups take ranges such as 10.0.10.101-10.0.10.199 or
2001:db8::100-2001:db8::1ff (negated, or with spaces around the dash, too).
Jarl stores the range as written and writes the fewest prefixes that cover
exactly that range to named.conf, with the range as a comment. New package
internal/iprange; namedconf gets an AMRange element (a range used to parse
as an ACL name), ExpandRanges and statement comments. Mistakes are refused
when entered, validation sees what ranges cover, and IPv6 ranges in the
IPv4-mapped space get a warning. The web UI shows what a range becomes
while typing (GET /catalog/ranges).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/web/static/assets/style.css

@@ -426,6 +426,11 @@ td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
 button.chip { padding: 1px 8px; font-size: 12px; font-family: var(--mono); border-radius: 999px; background: var(--info-soft); border: 1px solid var(--border); color: var(--text); }
 button.chip:hover { background: var(--accent-soft); border-color: var(--accent); }
 .aml-problems .msg { margin: 4px 0 0; padding: 3px 8px; }
+.range-hints .msg { margin: 4px 0 0; padding: 3px 8px; }
+.range-hint { margin-top: 4px; color: var(--muted); }
+.range-hint summary { cursor: pointer; }
+.range-hint .prefixes { display: flex; flex-wrap: wrap; gap: 2px 12px; margin: 2px 0 0 14px; }
+.range-hint .prefixes span { white-space: nowrap; }
 
 /* Zone name and record previews. */
 .segmented button { border: none; border-right: 1px solid var(--border); border-radius: 0; background: transparent; padding: 4px 12px; color: var(--text); }