Convert LinkById tags to Markdown Links when Exporting a Collection Bundle

[ElJocko]

Also moves the list of ATT&CK source_name values to a shared location.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #183 (3da4f67) into develop (b44f0ae) will increase coverage by 0.01%.
The diff coverage is 65.38%.

@@             Coverage Diff             @@
##           develop     #183      +/-   ##
===========================================
+ Coverage    55.43%   55.45%   +0.01%     
===========================================
  Files          105      105              
  Lines         5498     5518      +20     
  Branches      1123     1126       +3     
===========================================
+ Hits          3048     3060      +12     
- Misses        1834     1840       +6     
- Partials       616      618       +2     

Impacted Files	Coverage Δ
app/config/config.js	79.54% <ø> (ø)
app/services/collection-bundles-service.js	69.16% <57.14%> (-0.49%)	⬇️
app/lib/linkById.js	51.92% <62.50%> (+1.92%)	⬆️
app/models/attack-object-model.js	93.75% <100.00%> (ø)
app/services/stix-bundles-service.js	68.25% <100.00%> (ø)

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[ElJocko]

Closes #168