Refactor add_slide_breaks

Add previous header to new slide when starting new code block without its own header
refactor remove_paragraphs

remove header --- from output

remove extra line breaks after frontmatter

maintain unordered lists

remove extra newline break under a header
fix spacing issues after frontmatter

fix spacing error in sample_output

fix spacing error in sample_output

fix spacing error in sample_output
keep ordered lists

remove new slide from code block on page with text

remove trailing whitespaces from input_sample

remove extra # in header

remove getting started test

Remove pry
start to define Caller

first implementation of caller
initial rake task

remove extra linebreak

add require statements

remove puts from rake task