feat: add emoji-click-sync event as Safari workaround

[nolanlawson]

Fixes #281

I really don't like adding additional API surface just to work around a Safari bug, but even if WebKit fixes it tomorrow, there will be old versions of Safari floating around for ages.

Adds a new event, emoji-click-sync, which does the same thing as emoji-click but is synchronous and its event.detail is a promise for the same detail object in the non-sync version.

[github-actions]

📊 Tachometer Benchmark Results

Summary

benchmark-total

• emoji-picker-element-change-tab: unsure 🔍 -4% - +4% (-1.39ms - +1.37ms)
  ^{this-change vs tip-of-tree}
• emoji-picker-element-database-interactions: unsure 🔍 -3% - +3% (-3.74ms - +4.14ms)
  ^{this-change vs tip-of-tree}
• emoji-picker-element-first-load: unsure 🔍 -2% - +4% (-1.20ms - +2.24ms)
  ^{this-change vs tip-of-tree}
• emoji-picker-element-many-custom-emoji: unsure 🔍 -5% - +3% (-5.93ms - +3.53ms)
  ^{this-change vs tip-of-tree}
• emoji-picker-element-search: unsure 🔍 -4% - +6% (-2.01ms - +2.83ms)
  ^{this-change vs tip-of-tree}
• emoji-picker-element-second-load: unsure 🔍 -4% - +5% (-1.57ms - +2.19ms)
  ^{this-change vs tip-of-tree}

Results

emoji-picker-element-change-tab

• Browser: chrome-headless 139.0.0.0
• Sample size: 50
• Built by: Benchmarks #556

• Commit: 29a20b6

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	34.02ms - 36.07ms	-	unsure 🔍 -4% - +4% -1.39ms - +1.37ms
tip-of-tree tip-of-tree	34.13ms - 35.97ms	unsure 🔍 -4% - +4% -1.37ms - +1.39ms	-

emoji-picker-element-database-interactions

• Browser: chrome-headless 139.0.0.0
• Sample size: 50
• Built by: Benchmarks #556

• Commit: 29a20b6

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	121.24ms - 126.80ms	-	unsure 🔍 -3% - +3% -3.74ms - +4.14ms
tip-of-tree tip-of-tree	121.02ms - 126.61ms	unsure 🔍 -3% - +3% -4.14ms - +3.74ms	-

emoji-picker-element-first-load

• Browser: chrome-headless 139.0.0.0
• Sample size: 50
• Built by: Benchmarks #556

• Commit: 29a20b6

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	52.27ms - 54.74ms	-	unsure 🔍 -2% - +4% -1.20ms - +2.24ms
tip-of-tree tip-of-tree	51.79ms - 54.18ms	unsure 🔍 -4% - +2% -2.24ms - +1.20ms	-

emoji-picker-element-many-custom-emoji

• Browser: chrome-headless 139.0.0.0
• Sample size: 50
• Built by: Benchmarks #556

• Commit: 29a20b6

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	103.85ms - 110.56ms	-	unsure 🔍 -5% - +3% -5.93ms - +3.53ms
tip-of-tree tip-of-tree	105.07ms - 111.73ms	unsure 🔍 -3% - +6% -3.53ms - +5.93ms	-

emoji-picker-element-search

• Browser: chrome-headless 139.0.0.0
• Sample size: 60
• Built by: Benchmarks #556

• Commit: 29a20b6

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	43.60ms - 47.13ms	-	unsure 🔍 -4% - +6% -2.01ms - +2.83ms
tip-of-tree tip-of-tree	43.30ms - 46.61ms	unsure 🔍 -6% - +4% -2.83ms - +2.01ms	-

emoji-picker-element-second-load

• Browser: chrome-headless 139.0.0.0
• Sample size: 50
• Built by: Benchmarks #556

• Commit: 29a20b6

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	42.43ms - 45.18ms	-	unsure 🔍 -4% - +5% -1.57ms - +2.19ms
tip-of-tree tip-of-tree	42.22ms - 44.77ms	unsure 🔍 -5% - +4% -2.19ms - +1.57ms	-

_{tachometer-reporter-action v2 for Benchmarks}

[github-actions]

Size Change: +63 B (+0.17%)

Total Size: 37.4 kB

Filename	Size	Change
./bundle.js	37.4 kB	+63 B (+0.17%)

_{compressed-size-action}