Add eca official plugin marketplace

Author: ericdallo

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Add `plugins` config for loading external configuration from git repos or local paths. #349
   - Plugins can provide skills, MCP servers, agents, commands, hooks, rules, and arbitrary config overrides.
   - Add commands `/plugins` and `/plugin-install`.
+  - Add official plugin marketplace as built-in plugin source (`eca-marketplace`), available by default at `plugins.eca.dev`.
 - Fix race condition where stopping a prompt and immediately sending a new one could cause two concurrent prompts with no way to stop the older one.
 - Support `inherit` key in agent config to inherit settings from another agent.
 

src/eca/config.clj

@@ -192,7 +192,7 @@
    :completion {:model "openai/gpt-4.1"}
    :netrcFile nil
    :autoCompactPercentage 75
-   :plugins {}
+   :plugins {"eca" {:source "https://github.com/editor-code-assistant/eca-plugins.git"}}
    :env "prod"})
 
 (defn ^:private parse-dynamic-string-values