feat(WEB-37): core css file and linked static assets

public/Static/img/icons/arrows/arrow-down-dark.svg

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+<svg id="arrow-down" width="24" height="24" viewBox="0 0 24 24" fill="#404040" xmlns="http://www.w3.org/2000/svg">
+<path fill-rule="evenodd" clip-rule="evenodd" d="M21.7078 7.29179C21.3186 6.90262 20.6877 6.90248 20.2984 7.29146L11.806 15.776L3.31355 7.29146C2.92421 6.90248 2.29329 6.90262 1.90412 7.29179C1.5147 7.68121 1.51485 8.31263 1.90445 8.70187L10.3955 17.1851L10.3917 17.1889L11.8015 18.5987L11.806 18.5942L11.8104 18.5987L13.2202 17.1889L13.2164 17.1851L21.7075 8.70187C22.0971 8.31263 22.0972 7.68121 21.7078 7.29179Z" fill="inherit"/>
+</svg>

public/Static/img/icons/arrows/arrow-down-nordicsea-3px.svg

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+<svg width="22" height="14" viewBox="0 0 22 14" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M2 2L11 11L20 2" stroke="#00838E" stroke-width="3" stroke-linecap="round"/>
+</svg>

public/Static/img/icons/arrows/arrow-down-white.svg

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+<svg width="22" height="14" viewBox="0 0 22 14" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M2 2L11 11L20 2" stroke="white" stroke-width="3" stroke-linecap="round"/>
+</svg>

public/Static/img/icons/arrows/form-select-arrow-black.svg

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+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M3 8L12 17L21 8" stroke="black" stroke-width="3" stroke-linecap="round"/>
+</svg>