docs: migrate Obsidian vault

docs/.obsidian/icons/simple-icons/ios.svg

@@ -0,0 +1 @@
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>iOS</title><path d="M1.1 6.05C.486 6.05 0 6.53 0 7.13A1.08 1.08 0 0 0 1.1 8.21C1.72 8.21 2.21 7.73 2.21 7.13C2.21 6.53 1.72 6.05 1.1 6.05M8.71 6.07C5.35 6.07 3.25 8.36 3.25 12C3.25 15.67 5.35 17.95 8.71 17.95C12.05 17.95 14.16 15.67 14.16 12C14.16 8.36 12.05 6.07 8.71 6.07M19.55 6.07C17.05 6.07 15.27 7.45 15.27 9.5C15.27 11.13 16.28 12.15 18.4 12.64L19.89 13C21.34 13.33 21.93 13.81 21.93 14.64C21.93 15.6 20.96 16.28 19.58 16.28C18.17 16.28 17.11 15.59 17 14.53H15C15.08 16.65 16.82 17.95 19.46 17.95C22.25 17.95 24 16.58 24 14.4C24 12.69 23 11.72 20.68 11.19L19.35 10.89C17.94 10.55 17.36 10.1 17.36 9.34C17.36 8.38 18.24 7.74 19.54 7.74C20.85 7.74 21.75 8.39 21.85 9.46H23.81C23.76 7.44 22.09 6.07 19.55 6.07M8.71 7.82C10.75 7.82 12.06 9.45 12.06 12C12.06 14.57 10.75 16.2 8.71 16.2C6.65 16.2 5.35 14.57 5.35 12C5.35 9.45 6.65 7.82 8.71 7.82M.111 9.31V17.76H2.1V9.31H.11Z"/></svg>