Add reverse and step-back icons

src/vs/workbench/contrib/debug/browser/media/reverse-continue-inverse.svg

+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M13 3H11V13H13V3ZM8.5 3V13L2 8L8.5 3Z" fill="#75BEFF"/>
+</svg>

src/vs/workbench/contrib/debug/browser/media/reverse-continue.svg

+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M13 3H11V13H13V3ZM8.5 3V13L2 8L8.5 3Z" fill="#00539C"/>
+</svg>

src/vs/workbench/contrib/debug/browser/media/step-back-inverse.svg

+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<g clip-path="url(#clip0)">
+<path d="M6 13C6 13.3956 6.1173 13.7822 6.33706 14.1111C6.55682 14.44 6.86918 14.6964 7.23463 14.8478C7.60008 14.9991 8.00222 15.0387 8.39018 14.9616C8.77814 14.8844 9.13451 14.6939 9.41421 14.4142C9.69392 14.1345 9.8844 13.7781 9.96157 13.3902C10.0387 13.0022 9.99913 12.6001 9.84776 12.2346C9.69638 11.8692 9.44004 11.5568 9.11114 11.3371C8.78224 11.1173 8.39556 11 8 11C7.46957 11 6.96086 11.2107 6.58579 11.5858C6.21071 11.9609 6 12.4696 6 13Z" fill="#C5C5C5"/>
+<path d="M0.999998 2V8H7V6H4.763C5.27303 5.23323 6.00693 4.64224 6.86481 4.30742C7.72269 3.97261 8.6629 3.91024 9.55749 4.12881C10.4521 4.34737 11.2576 4.83626 11.8644 5.52893C12.4713 6.22161 12.85 7.08443 12.949 8H14.975C14.8733 6.6352 14.3422 5.3376 13.4579 4.29312C12.5736 3.24863 11.3813 2.51086 10.052 2.18549C8.72262 1.86012 7.3244 1.96385 6.05763 2.48183C4.79085 2.99981 3.72053 3.90545 3 5.069V2H0.999998Z" fill="#75BEFF"/>
+</g>
+<defs>
+<clipPath id="clip0">
+<rect width="16" height="16" fill="white" transform="matrix(-1 0 0 1 16 0)"/>
+</clipPath>
+</defs>
+</svg>

src/vs/workbench/contrib/debug/browser/media/step-back.svg

+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<g clip-path="url(#clip0)">
+<path d="M6 13C6 13.3956 6.1173 13.7822 6.33706 14.1111C6.55682 14.44 6.86918 14.6964 7.23463 14.8478C7.60008 14.9991 8.00222 15.0387 8.39018 14.9616C8.77814 14.8844 9.13451 14.6939 9.41421 14.4142C9.69392 14.1345 9.8844 13.7781 9.96157 13.3902C10.0387 13.0022 9.99913 12.6001 9.84776 12.2346C9.69638 11.8692 9.44004 11.5568 9.11114 11.3371C8.78224 11.1173 8.39556 11 8 11C7.46957 11 6.96086 11.2107 6.58579 11.5858C6.21071 11.9609 6 12.4696 6 13Z" fill="#424242"/>
+<path d="M0.999998 2V8H7V6H4.763C5.27303 5.23323 6.00693 4.64224 6.86481 4.30742C7.72269 3.97261 8.6629 3.91024 9.55749 4.12881C10.4521 4.34737 11.2576 4.83626 11.8644 5.52893C12.4713 6.22161 12.85 7.08443 12.949 8H14.975C14.8733 6.6352 14.3422 5.3376 13.4579 4.29312C12.5736 3.24863 11.3813 2.51086 10.052 2.18549C8.72262 1.86012 7.3244 1.96385 6.05763 2.48183C4.79085 2.99981 3.72053 3.90545 3 5.069V2H0.999998Z" fill="#00539C"/>
+</g>
+<defs>
+<clipPath id="clip0">
+<rect width="16" height="16" fill="white" transform="matrix(-1 0 0 1 16 0)"/>
+</clipPath>
+</defs>
+</svg>