ci: run jpm bootstrap from inside the jpm checkout

bootstrap.janet resolves jpm/cli.janet relative to cwd, so it must run
from /tmp/jpm rather than the repo root (fixes 'could not find file
jpm/cli.janet').

img/jolt-alt.svg

@@ -0,0 +1,68 @@
+<svg viewBox="0 0 600 600" width="100%" height="100%" xmlns="http://www.w3.org/2000/svg" style="max-width: 450px;">
+        <defs>
+            <!-- High-energy tri-color gradient -->
+            <linearGradient id="joltEnergy" x1="0%" y1="0%" x2="100%" y2="100%">
+                <stop offset="0%" stop-color="#FFDD00" />
+                <stop offset="50%" stop-color="#FF5500" />
+                <stop offset="100%" stop-color="#FF0055" />
+            </linearGradient>
+
+            <!-- Gradient for the subtle top inner highlight -->
+            <linearGradient id="boxHighlight" x1="0%" y1="0%" x2="0%" y2="100%">
+                <stop offset="0%" stop-color="rgba(255,255,255,0.15)" />
+                <stop offset="10%" stop-color="rgba(255,255,255,0)" />
+            </linearGradient>
+
+            <!-- Subtle neon glow filter for the bolt -->
+            <filter id="neonGlow" x="-30%" y="-30%" width="160%" height="160%">
+                <feGaussianBlur stdDeviation="16" result="blur" />
+                <feComponentTransfer in="blur" result="glow">
+                    <feFuncA type="linear" slope="0.4" />
+                </feComponentTransfer>
+                <feMerge>
+                    <feMergeNode in="glow" />
+                    <feMergeNode in="SourceGraphic" />
+                </feMerge>
+            </filter>
+
+            <!-- Native SVG drop shadow to replace the CSS box-shadow -->
+            <filter id="boxShadow" x="-20%" y="-20%" width="140%" height="140%">
+                <feDropShadow dx="0" dy="20" stdDeviation="25" flood-color="#000000" flood-opacity="0.5" />
+            </filter>
+        </defs>
+
+        <!-- Base rounded box with the dark background and outer drop shadow -->
+        <rect x="44" y="44" width="512" height="512" rx="64" fill="#161b22" filter="url(#boxShadow)" />
+        
+        <!-- Overlapping rect stroke to simulate the crisp CSS inset highlight -->
+        <rect x="45" y="45" width="510" height="510" rx="63" fill="none" stroke="url(#boxHighlight)" stroke-width="2" />
+
+        <!-- Translated group shifted by 44px to account for the new padded viewBox -->
+        <g transform="translate(109, 24)" filter="url(#neonGlow)">
+            
+            <!-- Main J-Bolt Shape -->
+            <path d="
+                M 140 100 
+                L 360 100 
+                L 260 250 
+                L 340 250 
+                L 180 450 
+                L 220 310 
+                L 140 310 
+                L 220 180 
+                L 140 180 
+                Z" 
+                fill="url(#joltEnergy)" 
+            />
+
+            <!-- Trailing speed fragment 1 (Top) -->
+            <path d="M 70 100 L 120 100 L 95 140 L 45 140 Z" fill="url(#joltEnergy)" opacity="0.9" />
+            
+            <!-- Trailing speed fragment 2 (Middle) -->
+            <path d="M 50 180 L 100 180 L 75 220 L 25 220 Z" fill="url(#joltEnergy)" opacity="0.75" />
+            
+            <!-- Trailing speed fragment 3 (Bottom) -->
+            <path d="M 80 260 L 110 260 L 85 300 L 55 300 Z" fill="url(#joltEnergy)" opacity="0.6" />
+
+        </g>
+    </svg>