e2e screencast generation and docs embedding

Signed-off-by: Fabian Kammel <fk@edgeless.systems>

docs/static/assets/check-sbom.cast

@@ -0,0 +1,46 @@
+{"version": 2, "width": 0, "height": 0, "timestamp": 1675859957, "env": {"SHELL": null, "TERM": "xterm"}}
+[0.003825, "o", "$ "]
+[0.00491, "o", "e"]
+[0.137328, "o", "c"]
+[0.187967, "o", "h"]
+[0.240046, "o", "o"]
+[0.290357, "o", " "]
+[0.340857, "o", "S"]
+[0.390951, "o", "t"]
+[0.511681, "o", "e"]
+[0.56956, "o", "p"]
+[0.61976, "o", " "]
+[0.672456, "o", "0"]
+[0.723166, "o", ":"]
+[0.773122, "o", " "]
+[0.860846, "o", "I"]
+[0.919429, "o", "n"]
+[0.970394, "o", "s"]
+[1.159058, "o", "t"]
+[1.237391, "o", "a"]
+[1.35056, "o", "l"]
+[1.403067, "o", "l"]
+[1.561877, "o", "i"]
+[1.619898, "o", "n"]
+[1.683962, "o", "g"]
+[1.734714, "o", " "]
+[1.788163, "o", "r"]
+[1.846651, "o", "e"]
+[1.910593, "o", "q"]
+[1.979596, "o", "u"]
+[2.03013, "o", "i"]
+[2.080866, "o", "r"]
+[2.184044, "o", "e"]
+[2.239835, "o", "m"]
+[2.289997, "o", "e"]
+[2.34052, "o", "n"]
+[2.394017, "o", "t"]
+[2.447544, "o", "s\r\n"]
+[2.44777, "o", "Step 0: Installing requirements\r\n$ "]
+[3.481334, "o", "c"]
+[3.630236, "o", "u"]
+[3.687787, "o", "r"]
+[3.753317, "o", "l"]
+[3.805315, "o", " "]
+[3.873631, "o", "-"]
+[3.925427, "o", "s"]