add some todos

  eleventyConfig.addAsyncFilter("getReadMe", async (repoName: string, branchName: string) => {
    const location = getLocation(reposConfiguration, repoName)
    // TODO allow for other filenames besides README.md
    const command = `git -C ${location} show ${branchName}:README.md`
    try {
      const res = await exec(command)

      for the URL. But underscores *are* valid for using in a URL, and also,
      there could also be a folder called `wiki-and-tasks` with hyphens, and
      they would both be able to exist in the repository.
- [ ] better separation of base features and default template
  - make sure that buildSteps can copy things into directories that weren't
    created as part of the site generation.
  - Maybe allow `copyTo` to have variable interpolation in it, for totally
    custom directory paths
- [ ] Make merged commits show up in the commits list and commit page.
  - These don't show up as anything right now