message: todo: add format intro and examples to README
diff: This plugin lists `// TODO` comments in source code. It currently exports a single component extension for use on entity pages.
  +## Format
  +
  +The default parser uses [Leasot](https://github.com/pgilad/leasot), which supports a wide range of languages. By default it supports the `TODO` and `FIXME` tags, along with `@` prefix and author reference through with either a `(<name>)` suffix or trailing `/<name>`. For more information on how to configure the parser, see `@backstage/plugin-todo-backend`.
  +
  +Below are some examples of formats that are supported by default:
  +
  +```ts
  +// TODO: Ideally this would be working
  +
  +// TODO(Rugvip): Not sure why this works, investigate
  +
  +// @todo: This worked last Monday /Rugvip
  +
  +// FIXME Nobody knows why this is here
  +```
  +
  +Note the trailing comments are not supported, the following TODO would not be listed:
  +
  +```ts
  +function reverse(str: string) {
  + return str.reverse(); // TODO: optimize
  +}
  +```
  +
  +The scanner also ignores all dot-files and directories, meaning TODOs inside of those will not be listed.
  +
  ## Extensions
  | name | description |
  