refactor: simplify loadJson function and update benchmark result stru…

[deleonio]

…cture

Refs: #7778

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[github-actions]

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[github-actions]

Hydration Benchmark Report (vs Baseline)

📊 Flop 5 Regressions

Component	Current	Baseline	Δ%	Result
kol-drawer	17ms	13ms	+30.8%	🔻
kol-progress	10ms	8ms	+25.0%	🔻
kol-toolbar	8ms	7ms	+14.3%	🔻
kol-quote	9ms	8ms	+12.5%	🔻
kol-card	28ms	25ms	+12.0%	🔻

📋 Show all results

Component	Current	Baseline	Δ%	Result
kol-abbr	10ms	13ms	-23.1%	✅
kol-accordion	66ms	75ms	-12.0%	✅
kol-alert	26ms	24ms	+8.3%	🔻
kol-avatar	12ms	11ms	+9.1%	🔻
kol-badge	34ms	31ms	+9.7%	🔻
kol-breadcrumb	19ms	18ms	+5.6%	🔻
kol-button	53ms	54ms	-1.9%	➖
kol-button-link	56ms	54ms	+3.7%	➖
kol-details	64ms	67ms	-4.5%	➖
kol-form	12ms	11ms	+9.1%	🔻
kol-heading	25ms	29ms	-13.8%	✅
kol-icon	11ms	10ms	+10.0%	🔻
kol-image	7ms	12ms	-41.7%	✅
kol-input-checkbox	36ms	35ms	+2.9%	➖
kol-input-color	37ms	36ms	+2.8%	➖
kol-input-date	38ms	38ms	0.0%	➖
kol-input-email	38ms	37ms	+2.7%	➖
kol-input-file	70ms	66ms	+6.1%	🔻
kol-input-number	32ms	35ms	-8.6%	✅
kol-input-password	35ms	35ms	0.0%	➖
kol-input-radio	29ms	29ms	0.0%	➖
kol-input-text	39ms	44ms	-11.4%	✅
kol-link	54ms	50ms	+8.0%	🔻
kol-link-button	52ms	49ms	+6.1%	🔻
kol-modal	9ms	9ms	0.0%	➖
kol-nav	12ms	11ms	+9.1%	🔻
kol-pagination	75ms	73ms	+2.7%	➖
kol-popover-button	57ms	52ms	+9.6%	🔻
kol-select	32ms	32ms	0.0%	➖
kol-skip-nav	11ms	16ms	-31.3%	✅
kol-spin	8ms	9ms	-11.1%	✅
kol-split-button	61ms	64ms	-4.7%	➖
kol-table-stateful	86ms	82ms	+4.9%	➖
kol-table-stateless	78ms	74ms	+5.4%	🔻
kol-tabs	12ms	15ms	-20.0%	✅
kol-textarea	30ms	34ms	-11.8%	✅
kol-tree	11ms	11ms	0.0%	➖
kol-tree-item	55ms	56ms	-1.8%	➖
kol-version	45ms	44ms	+2.3%	➖