Scaffold ocd: config, HTTP fetch, cache, paced pipeline, render

Rust CLI with clap subcommands (pretty/raw json/raw plain/fetch/cache/config).
Per-workspace dual HTTP (Zen balance + Go limits) run with tokio::join,
500 ms workspace pacing, TTL-180s file cache, retry/backoff for transient
failures. scrape.rs holds the only OpenCode-coupled HTML selectors (placeholders
until the real Zen/Go pages are captured). Unicode blitter-block bars in
pretty mode; stable JSON/plain raw output for widgets and agent plugins.

examples/ocd.toml

@@ -0,0 +1,15 @@
+# Example ocd config. Copy to ~/.config/ocd/config.toml and edit.
+# Cookies are the full Cookie header value. ${VAR} expands from the environment.
+default_concurrency = 1
+default_ttl_secs    = 180
+
+[[account]]
+name              = "work"
+cookie            = "${OCD_COOKIE_WORK}"
+default_workspace = "ws_REPLACE_ME"
+extra_workspaces  = []
+
+[[account]]
+name              = "personal"
+cookie            = "ocd_session=...."
+default_workspace = "ws_REPLACE_ME"