Move AI agents template to Global and scope default ignores

Keep only documented local/high-churn agent artifacts active by default, preserving common shared instruction/config files as commented opt-in examples

Author: robbiemu

Agents.gitignore

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+# AI agents and assistants
+#
+# Some common agent instruction and project configuration files are listed
+# below as commented-out examples. They are often intentionally committed and
+# shared with a team, so only uncomment them if they are local-only in your
+# project.
+
+# AGENTS.md
+# GEMINI.md
+# WARP.md
+# CRUSH.md
+# QWEN.md
+
+# Aider
+.aider.input.history
+.aider.chat.history.md
+.aider.llm.history
+.aider.tags.cache.v*
+# .aiderignore
+
+# Claude Code
+.claude/*.local.json
+.claude/**/*.log
+CLAUDE.local.md
+# .claude/
+
+# Gemini CLI
+gemini-debug.log
+.gemini-clipboard/
+# .gemini/
+
+# Cursor AI
+# .cursorrules
+# .cursor/
+# .cursor.json
+# .cursor-settings.yaml
+
+# Continue
+# .continue/
+# .continuerc.json
+
+# Cline
+# .cline/
+# .clinerules
+# cline.json
+
+# Other agent/editor project config
+# .warp/
+# .crush/
+# .codeium/
+# .deepseek/
+# .amazon-codewhisperer/
+# .tabnineignore
+# .tabnine/
+
+# GitHub Copilot
+# .github/copilot-instructions.md
+
+# Windsurf Editor
+# .windsurfrules
+# .windsurf/
+
+# Replit AI Development
+# .replit
+# replit.nix