fix: rename plugin id from ecc to everything-claude-code in manifests

The marketplace is registered externally as `everything-claude-code`,
so the Claude Code CLI looks for a plugin named `everything-claude-code`
within it. Both `.claude-plugin/marketplace.json` and
`.claude-plugin/plugin.json` used the short alias `ecc` for the plugin
`name` field, causing a lookup miss at install/update time:

  Error: Plugin everything-claude-code not found in marketplace everything-claude-code

Change the `name` field in both files to match the external identifier.

.claude-plugin/marketplace.json

@@ -1,5 +1,5 @@
 {
-  "name": "ecc",
+  "name": "everything-claude-code",
   "owner": {
     "name": "Affaan Mustafa",
     "email": "me@affaanmustafa.com"
@@ -9,7 +9,7 @@
   },
   "plugins": [
     {
-      "name": "ecc",
+      "name": "everything-claude-code",
       "source": "./",
       "description": "The most comprehensive Claude Code plugin — 38 agents, 156 skills, 72 legacy command shims, selective install profiles, and production-ready hooks for TDD, security scanning, code review, and continuous learning",
       "version": "1.10.0",

.claude-plugin/plugin.json

@@ -1,5 +1,5 @@
 {
-  "name": "ecc",
+  "name": "everything-claude-code",
   "version": "1.10.0",
   "description": "Battle-tested Claude Code plugin for engineering teams — 38 agents, 156 skills, 72 legacy command shims, production-ready hooks, and selective install workflows evolved through continuous real-world use",
   "author": {