Add SPARQL queries for Bangla adjectives and prepositions

[mhmohona]

Contributor checklist

• [x] This pull request is on a separate branch and not the main branch

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Description

This PR adds SPARQL queries for retrieving Bangla (Bengali) adjectives and prepositions from Wikidata.

Related issue

Fixes #134

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[mhmohona]

I am concerned about the preposition script as I am getting only 1 preposition from it.

[mhmohona]

Thank YOU for your support @andrewtavis! ^_^

[andrewtavis]

Thank you for your hard work, @mhmohona!

One note on this that came from the Wikidata Lexemes community is the Bangla there also are a lot of postpositions :) Question is, do we make a different query for that or include both in one 🤔