add a paragraph of text into an rdocx object
     
    
    Usage
    body_add_par(x, value, style = NULL, pos = "after")
 
    
    Arguments
- x
- a docx device 
- value
- a character 
- style
- paragraph style name 
- pos
- where to add the new element relative to the cursor,
one of "after", "before", "on". 
 
    
    See also
    Other functions for adding content:
body_add_blocks(),
body_add_break(),
body_add_caption(),
body_add_docx(),
body_add_fpar(),
body_add_gg(),
body_add_img(),
body_add_plot(),
body_add_table(),
body_add_toc(),
body_append_start_context(),
body_import_docx()
 
    
    Examples
    doc <- read_docx()
doc <- body_add_par(doc, "A title", style = "heading 1")
doc <- body_add_par(doc, "Hello world!", style = "Normal")
doc <- body_add_par(doc, "centered text", style = "centered")
print(doc, target = tempfile(fileext = ".docx"))