chore: retire the Everything Claude Code name, ECC only (#3330)

* chore: retire the Everything Claude Code name, ECC only

Replace the expanded product name and the everything-claude-code slug
with ECC across READMEs, translated docs, harness folders, skills,
commands, scripts and examples. Repo URLs now point at affaan-m/ECC.

Rename repo-internal artifacts to ecc forms (ecc-conventions skill,
ecc-guardrails, ecc-research-playbook, ecc-team-config, ecc-instincts
with ecc-* ids) and update .claude/ecc-tools.json.

Legacy install ids, plugin dirs, package names and MCP prefixes stay
where existing installs resolve against them. The codex global-state
check and harness-audit repo detection accept the new name first and
the legacy one as a fallback. The Discord bot prefers ~/GitHub/ECC and
falls back to the nested legacy checkout path.

Refresh the skill-triggers registryDigest for the changed skill text.

* fix(ecc-tools): drop managed paths to the removed Claude repo skill

.claude/skills/<repo-skill>/SKILL.md was deleted in #2770 but stayed listed in
ecc-tools.json and the team config. Remove those entries and point the Claude
Code adapter at the existing .agents/skills/ecc-conventions/SKILL.md.

.codebuddy/README.md

@@ -1,6 +1,6 @@
-# Everything Claude Code for CodeBuddy
+# ECC for CodeBuddy
 
-Bring Everything Claude Code (ECC) workflows to CodeBuddy IDE. This repository provides custom commands, agents, skills, and rules that can be installed into any CodeBuddy project using the unified Target Adapter architecture.
+Bring ECC workflows to CodeBuddy IDE. This repository provides custom commands, agents, skills, and rules that can be installed into any CodeBuddy project using the unified Target Adapter architecture.
 
 ## Quick Start (Recommended)
 

.codebuddy/README.zh-CN.md

@@ -1,6 +1,6 @@
-# Everything Claude Code for CodeBuddy
+# ECC for CodeBuddy
 
-为 CodeBuddy IDE 带来 Everything Claude Code (ECC) 工作流。此仓库提供自定义命令、智能体、技能和规则，可以通过统一的 Target Adapter 架构安装到任何 CodeBuddy 项目中。
+为 CodeBuddy IDE 带来 ECC 工作流。此仓库提供自定义命令、智能体、技能和规则，可以通过统一的 Target Adapter 架构安装到任何 CodeBuddy 项目中。
 
 ## 快速开始（推荐）
 

.codebuddy/install.js

@@ -1,7 +1,7 @@
 #!/usr/bin/env node
 /**
  * ECC CodeBuddy Installer (Cross-platform Node.js version)
- * Installs Everything Claude Code workflows into a CodeBuddy project.
+ * Installs ECC workflows into a CodeBuddy project.
  *
  * Usage:
  *   node install.js              # Install to current directory

.codebuddy/install.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 #
 # ECC CodeBuddy Installer
-# Installs Everything Claude Code workflows into a CodeBuddy project.
+# Installs ECC workflows into a CodeBuddy project.
 #
 # Usage:
 #   ./install.sh              # Install to current directory

.codebuddy/uninstall.js

@@ -1,7 +1,7 @@
 #!/usr/bin/env node
 /**
  * ECC CodeBuddy Uninstaller (Cross-platform Node.js version)
- * Uninstalls Everything Claude Code workflows from a CodeBuddy project.
+ * Uninstalls ECC workflows from a CodeBuddy project.
  *
  * Usage:
  *   node uninstall.js              # Uninstall from current directory

.codebuddy/uninstall.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 #
 # ECC CodeBuddy Uninstaller
-# Uninstalls Everything Claude Code workflows from a CodeBuddy project.
+# Uninstalls ECC workflows from a CodeBuddy project.
 #
 # Usage:
 #   ./uninstall.sh              # Uninstall from current directory