chore: use custom ResizeObserver polyfill

📊 Tachometer Benchmark Results

emoji-picker-element-change-tab: unsure 🔍 -1% - +1% (-0.20ms - +0.42ms)
^{this-change vs tip-of-tree}
emoji-picker-element-database-interactions: faster ✔ 1% - 6% (0.45ms - 5.58ms)
^{this-change vs tip-of-tree}
emoji-picker-element-first-load: unsure 🔍 -8% - +1% (-4.04ms - +0.60ms)
^{this-change vs tip-of-tree}
emoji-picker-element-search: unsure 🔍 -0% - +0% (-0.03ms - +0.07ms)
^{this-change vs tip-of-tree}
emoji-picker-element-second-load: unsure 🔍 -7% - +4% (-2.79ms - +1.37ms)
^{this-change vs tip-of-tree}

emoji-picker-element-change-tab

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	33.42ms - 33.81ms	-	unsure 🔍 -1% - +1% -0.20ms - +0.42ms
tip-of-tree tip-of-tree	33.27ms - 33.74ms	unsure 🔍 -1% - +1% -0.42ms - +0.20ms	-

emoji-picker-element-database-interactions

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	94.81ms - 97.67ms	-	faster ✔ 1% - 6% 0.45ms - 5.58ms
tip-of-tree tip-of-tree	97.13ms - 101.38ms	slower ❌ 0% - 6% 0.45ms - 5.58ms	-

emoji-picker-element-first-load

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	45.47ms - 47.75ms	-	unsure 🔍 -8% - +1% -4.04ms - +0.60ms
tip-of-tree tip-of-tree	46.31ms - 50.35ms	unsure 🔍 -1% - +9% -0.60ms - +4.04ms	-

emoji-picker-element-search

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	50.02ms - 50.09ms	-	unsure 🔍 -0% - +0% -0.03ms - +0.07ms
tip-of-tree tip-of-tree	50.01ms - 50.07ms	unsure 🔍 -0% - +0% -0.07ms - +0.03ms	-

emoji-picker-element-second-load

Version	Avg time	vs this-change	vs tip-of-tree tip-of-tree
this-change	35.41ms - 38.26ms	-	unsure 🔍 -7% - +4% -2.79ms - +1.37ms
tip-of-tree tip-of-tree	36.04ms - 39.06ms	unsure 🔍 -4% - +8% -1.37ms - +2.79ms	-