Update Instructions for Building RST Documentation

Problem Details

The symfony/symfony-docs project has changed their RST documentation build procedure from a Python and Sphinx compilation process to a PHP application in symfony/symfony-docs#16068.

The new RST documentation build process relies on an internal (and not officially supported, but MIT licensed) PHP command-line app in the symfony-tools/docs-builder project, which internally utilizes the doctrine/rst-parser library for RST parsing.

Over the next week or two, I will be updating the Wiki instructions for this bundle to use the new symfony/symfony-docs RST documentation build procedure, and will further provide a pull request to address any changes needed within the project itself to facilitate the new RST compilation procedure.

If anyone has any feedback as to how our RST build instructions could otherwise be improved, or if anyone has any input as the primary goals of this report, please feel free to comment. Otherwise, I will provide updates here as I progress.

Template Questions

Preconditions / Steps to Reproduce

1. Follow the RST documentation compilation instructions from github.com/liip/LiipImagineBundle/wiki/Building-RST-Documentation.

Expected Result

1. The bundle RST documentation is compiled into HTML.

Actual Result

1. An large number of steps fail due to the instruction's reliance on symfony/symfony-docs files and build process.