chore(nlp): Bulgarian added to contenful

[elozano98]

Depends on #1249. Please, review it first. ⚠️

Description

Bulgarian tokenizer, stemmer, and stopwords have been added to contentful nlp.

Context

Adding them will make it possible to process Bulgarian text.

Approach taken / Explain the design

• The Tokenizer used is the base-tokenizer from the nlpjs library.

• The Stemmer has been implemented having as a reference this GitHub repository.

• The Stopwords have been collected from here.

Testing

The pull request...

• has unit tests

[vanbasten17]

good job!! 💯 💯 💯

[ericmarcos]

https://www.youtube.com/watch?v=H2-6ochfjzk

[codecov]

Codecov Report

Merging #1250 (38e4179) into contentful/nl (a269138) will increase coverage by 0.11%.
The diff coverage is 88.00%.

@@                Coverage Diff                @@
##           contentful/nl    #1250      +/-   ##
=================================================
+ Coverage          64.62%   64.73%   +0.11%     
=================================================
  Files                232      236       +4     
  Lines               6443     6469      +26     
  Branches            1115     1118       +3     
=================================================
+ Hits                4164     4188      +24     
  Misses              1966     1966              
- Partials             313      315       +2     

Flag	Coverage Δ
botonic-plugin-contentful	71.32% <88.00%> (+0.14%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...nlp/stemmers/transformations/transformations-bg.ts	100.00% <ø> (ø)
...c-plugin-contentful/src/nlp/stemmers/stemmer-bg.ts	81.25% <81.25%> (ø)
...kages/botonic-plugin-contentful/src/nlp/locales.ts	100.00% <100.00%> (ø)
...kages/botonic-plugin-contentful/src/nlp/stemmer.ts	95.91% <100.00%> (+0.17%)	⬆️
...lugin-contentful/src/nlp/stopwords/stopwords-bg.ts	100.00% <100.00%> (ø)
...ugin-contentful/src/nlp/tokenizers/tokenizer-bg.ts	100.00% <100.00%> (ø)
...ckages/botonic-plugin-contentful/src/nlp/tokens.ts	96.07% <100.00%> (+0.11%)	⬆️
... and 2 more

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