chore: import upstream snapshot with attribution

docs/md/explanation/architecture.md

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+# Data Architecture
+
+Application developers can choose from
+[Client (WebAssembly)](./architecture/client_only.md),
+[Server (Python/Node)](./architecture/server_only.md) or
+[Client/Server Replicated](./architecture/client_server.md) designs to bind
+data, and a web application can use one or a mix of these designs as needed. By
+serializing to Apache Arrow, tables are duplicated and synchronized across
+runtimes efficiently.
+
+Perspective is a multi-language platform. The examples in this section use
+Python and JavaScript as an example, but the same general principles apply to
+any `Client`/`Server` combination.
+
+<img src="./architecture/architecture.svg" />