Create tool to generate invalid FurtherReading link (in progress)

[sumandari]

This PR fixes #1326.

• [x] Create class to generate invalid Further Reading link
• [x] Write unit test
• [x] Display on frontend
• [x] save the output

/cc @NyakudyaA

[codecov[bot]]

Codecov Report

Merging #1327 (e7e8fcf) into develop (f243a60) will decrease coverage by 0.00%. The diff coverage is 62.33%.

@@             Coverage Diff             @@
##           develop    #1327      +/-   ##
===========================================
- Coverage    63.82%   63.82%   -0.01%     
===========================================
  Files          180      180              
  Lines         9541     9618      +77     
  Branches       736      748      +12     
===========================================
+ Hits          6090     6139      +49     
- Misses        3218     3242      +24     
- Partials       233      237       +4     

Impacted Files	Coverage Δ
django_project/lesson/urls.py	86.66% <ø> (ø)
django_project/lesson/views/further_reading.py	52.30% <23.07%> (-19.49%)	:arrow_down:
django_project/lesson/utilities.py	71.42% <82.35%> (+21.42%)	:arrow_up:
django_project/lesson/signals/further_reading.py	100.00% <0.00%> (+14.28%)	:arrow_up:

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[sumandari]

click on the check invalid link button

checking the invalid link

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result with anchor element

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[NyakudyaA]

Thanks, @sumandari, Can you save that output to PDF or any format.

[sumandari]

Alright @NyakudyaA, I will create the function to save the output.

[sumandari]

Add the download button in modal:

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PDF result

[NyakudyaA]

Can we get this merged @sumandari

[sumandari]

some changes haven't covered by unit test. will added it with another ticket.