Restructure examples folder (#47)

Split examples into separate markdown files, each containing a description, sample code, and a screenshot of the resulting xlsx document.

The script `generate.rb` is provided to actually generate the example documents by executing the sample code contained in the markdown files.

1 files changed, 25 insertions, 0 deletions

diff --git a/examples/image_example.md b/examples/image_example.md
new file mode 100644
index 00000000..e434c1b3
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+++ b/examples/image_example.md
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+## Description
+
+You could add images. All the options could be added in a do block, so instead of `sheet.add_image(width: 720)` you could say `sheet.add_image { |image| image.width = 720 }`.
+
+## Code
+
+```ruby
+require 'axlsx'
+
+p = Axlsx::Package.new
+wb = p.workbook
+
+image = File.expand_path('assets/image1.jpeg')
+
+wb.add_worksheet(name: 'Image') do |sheet|
+  sheet.add_image(image_src: image, start_at: 'B2', width: 100, height: 100)
+  sheet.add_image(image_src: image, start_at: 'E1', end_at: 'G3')
+end
+
+p.serialize 'image_example.xlsx'
+```
+
+## Output
+
+![Output](images/image_example.png "Output")