Bsky short link service (#4542)

* bskylink: scaffold service w/ initial config and schema

* bskylink: implement link creation and redirects

* bskylink: tidy

* bskylink: tests

* bskylink: tidy, add error handler

* bskylink: add dockerfile

* bskylink: add build

* bskylink: fix some express plumbing

* bskyweb: proxy fallthrough routes to link service redirects

* bskyweb: build w/ link proxy

* Add AASA to bskylink (#4588)

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Co-authored-by: Hailey <me@haileyok.com>

bskylink/tsconfig.json

@@ -0,0 +1,10 @@
+{
+    "compilerOptions": {
+      "module": "NodeNext",
+      "esModuleInterop": true,
+      "moduleResolution": "NodeNext",
+      "outDir": "dist",
+      "lib": ["ES2021.String"]
+    },
+    "include": ["./src/index.ts", "./src/bin.ts"]
+  }