Initial commit: PRD and SPEC for emcli

emcli is a Go CLI that mediates an AI agent's email access, enforcing
per-account read/send restrictions so credentials never reach the agent.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,21 @@
+# Binaries
+/emcli
+/dist/
+*.exe
+*.test
+
+# Go
+/vendor/
+*.out
+coverage.*
+
+# Local config / secrets — never commit
+*.db
+*.sqlite
+.env
+.env.*
+
+# Editor / OS
+.DS_Store
+.idea/
+.vscode/