merge opencode's original system prompt (including AGENTS.md) into system prompt#17

kikoreis wants to merge 4 commits into

dotCipher:maindotCipher/opencode-claude-bridge:mainfrom

kikoreis:fix/merge-agents-md-into-system-promptkikoreis/opencode-claude-bridge:fix/merge-agents-md-into-system-promptCopy head branch name to clipboard