블록 템플릿 업데이트: 수정 3개 + 신규 17개 + catalog.yaml 재정비

수정:
- compare-2col-badge, compare-detail-gradient, hero-icon-cards 개선

신규 블록:
- cards: category-strip-table, system-2col-center, hero-icon-cards_1
- emphasis: checklist-dark
- visuals: cycle-orbit
- new/: cards-3col-persona, compare-vs-rows, cycle-3way-intersect 등 8개
- redesign/: card_hero-icon-cards_1
- svg/: arc_left, arrow_conclusion, arrow_down, line_divider
- BEPs: process-product-2col SVG + 테스트

catalog.yaml 전면 재정비 (슬롯 스키마, height_cost, 카테고리 정리)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

templates/blocks/svg/arc_left.svg

@@ -0,0 +1,30 @@
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+<rect id="Rectangle 43995" y="379.999" width="270" height="95" fill="var(--fill-0, #65C6C4)" fill-opacity="0.8"/>
+</g>
+</g>
+<defs>
+<filter id="filter0_d_106_321" x="0" y="0" width="210.699" height="489.919" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
+<feFlood flood-opacity="0" result="BackgroundImageFix"/>
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+<feOffset dx="5" dy="10"/>
+<feGaussianBlur stdDeviation="2.5"/>
+<feComposite in2="hardAlpha" operator="out"/>
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+<feBlend mode="normal" in2="BackgroundImageFix" result="effect1_dropShadow_106_321"/>
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+</filter>
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+<stop offset="1" stop-color="#14706E"/>
+</linearGradient>
+</defs>
+</svg>