docs: generate gitea wiki pages + publish script

add wiki/ markdown pages (Home, Sidebar, architecture, transport, developer, usage)

add scripts/publish_gitea_wiki.sh to sync wiki repo

fix: serialize aggregate env-setting tests to avoid parallel env var races

wiki/Developer-Setup.md

@@ -0,0 +1,24 @@
+# Developer Setup
+
+## Prerequisites
+- Rust toolchain (stable)
+- Node.js (LTS) for control/ui
+- Docker (optional) for local stack
+
+## Build
+```bash
+cargo build
+cd control/ui && npm ci && npm run build
+```
+
+## Workspace Verification
+```bash
+cargo fmt --check
+cargo clippy --workspace --all-targets -- -D warnings
+cargo test --workspace
+cd control/ui && npm ci && npm run lint && npm run typecheck && npm run test && npm run build
+```
+
+## Environment
+- Projection: PROJECTION_GRPC_ADDR
+- Runner: RUNNER_GRPC_ADDR