feat(init): initial commit

README.md

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+# NoteVC: Version Control for Markdown
+# Repository management
+notevc init [path]                    # Initialize notevc repo
+notevc status                         # Show changed files
+notevc commit "message"               # Create snapshot
+notevc log [--since=time]            # Show commit history
+
+# Viewing changes
+notevc diff [file]                    # Show changes since last commit
+notevc diff HEAD~1 [file]            # Compare with previous commit
+notevc show <commit-hash>             # Show specific commit
+
+# Restoration
+notevc restore <commit-hash> [file]   # Restore to specific version
+notevc checkout <commit-hash>         # Restore entire repo state
+
+# Utilities
+notevc clean                          # Remove old snapshots
+notevc gc                            # Garbage collect unused objects
+notevc config                        # Show/set configuration
+