feat(editor): add WSRG (Spell Range Index) open catalog format

Open replacement for Blizzard's SpellRange.dbc plus the per-spell
range-bucket fields in Spell.dbc. Defines the categorical range
buckets that spells reference instead of carrying their own min/max
yards (every Frostbolt shares one 30y bucket; every Heal shares
one 40y friendly bucket). Each entry carries separate min/max for
hostile vs friendly targets so heals can reach further on allies
than nukes do on enemies, plus an icon color for HUD range
indicators.

Three preset emitters: --gen-srg (3 baseline buckets:
Self/Melee/Spell), --gen-srg-ranged (5 ranged spell buckets:
Short/Medium/Long/VeryLong/Unlimited), --gen-srg-friendly (3
friendly-only buckets where hostile range is 0). --info-wsrg and
--validate-wsrg round out the per-format surface; validation
catches negative ranges, min>max, duplicate ids, out-of-range
rangeKind, and warns on Self+nonzero range or Melee>8y.

Wired through the cross-format table so WSRG appears automatically
in --list-formats, --info-magic, --diff-headers, --summary-dir,
--rename-by-magic, --catalog-grep, --tree-summary-md, and
--touch-tree. Format count 67 -> 68; CLI flag count 885 -> 890.

tools/editor/cli_format_table.cpp

@@ -70,6 +70,7 @@ constexpr FormatMagicEntry kFormats[] = {
     {{'W','C','R','R'}, ".wcrr",  "stats",     "--info-wcrr",      "Combat rating conversion catalog"},
     {{'W','U','M','V'}, ".wumv",  "stats",     "--info-wumv",      "Unit movement type catalog"},
     {{'W','Q','S','O'}, ".wqso",  "quests",    "--info-wqso",      "Quest sort / category catalog"},
+    {{'W','S','R','G'}, ".wsrg",  "spells",    "--info-wsrg",      "Spell range bucket catalog"},
     {{'W','F','A','C'}, ".wfac",  "factions",  nullptr,            "Faction catalog"},
     {{'W','L','C','K'}, ".wlck",  "locks",     nullptr,            "Lock catalog"},
     {{'W','S','K','L'}, ".wskl",  "skills",    nullptr,            "Skill catalog"},