Render Birdstar bird detections and custom constellations

Adds feed support for kind 2473 (bird-by-ear detections) and kind 30621
(user-drawn star figures) from Birdstar. Detections render as species
cards using the existing Wikidata + Wikipedia summary hooks; constellations
render as gnomonically-projected SVG star-maps backed by the Hipparcos
catalog from d3-celestial. The 1.1 MB catalog is code-split via lazy() so
it only loads when a constellation event is actually viewed.

package-lock.json

@@ -101,6 +101,7 @@
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "cmdk": "^1.0.0",
+        "d3-celestial": "^0.7.35",
         "date-fns": "^3.6.0",
         "dompurify": "^3.3.3",
         "embla-carousel-react": "^8.3.0",
@@ -8106,6 +8107,12 @@
       "integrity": "sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ==",
       "license": "MIT"
     },
+    "node_modules/d3": {
+      "version": "3.5.17",
+      "resolved": "https://registry.npmjs.org/d3/-/d3-3.5.17.tgz",
+      "integrity": "sha512-yFk/2idb8OHPKkbAL8QaOaqENNoMhIaSHZerk3oQsECwkObkCpJyjYwCe+OHiq6UEdhe1m8ZGARRRO3ljFjlKg==",
+      "license": "BSD-3-Clause"
+    },
     "node_modules/d3-array": {
       "version": "3.2.4",
       "resolved": "https://registry.npmjs.org/d3-array/-/d3-array-3.2.4.tgz",
@@ -8118,6 +8125,15 @@
         "node": ">=12"
       }
     },
+    "node_modules/d3-celestial": {
+      "version": "0.7.35",
+      "resolved": "https://registry.npmjs.org/d3-celestial/-/d3-celestial-0.7.35.tgz",
+      "integrity": "sha512-cURxIl0E+FGWnYj6gTDt80SjuiM9lklcGykj/skVy7glDg5nj/QxTUoPPArU+bpEQ+1fLy5hi920OvJ/TgliRw==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "d3": "^3.5.17"
+      }
+    },
     "node_modules/d3-color": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/d3-color/-/d3-color-3.1.0.tgz",