Logseq Doctor: heal your flat old Markdown files before importing to Logseq

Logseq Doctor is a command-line tool designed to prepare and manage Markdown files for use in Logseq, offering features such as converting flat Markdown to outline format, managing tasks and backlogs, and cleaning up file structure. Built in Go for performance, it can be installed via `go install` or Homebrew and provides utilities for content management, task organization, and preventing invalid commits to Logseq graphs. The tool includes capabilities for backlog aggregation, task listing, and interactive file tidying to standardize Markdown before importing.