refactor: extract @interslavic/utils

[noomorph]

Related to: #60

The conjugation, declination functions are moved to @interslavic/utils in order to facilitate code reuse by any other Interslavic projects.

The facade remains the same so the changes are trivial and minimal. All the test cases were moved accordingly and they run 100% 🟢 as expected.

[coveralls]

Pull Request Test Coverage Report for Build 5208499450

• 0 of 25 (0.0%) changed or added relevant lines in 5 files are covered.
• 75 unchanged lines in 7 files lost coverage.
• Overall coverage decreased (-27.0%) to 2.787%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/services/dictionary.ts	0	1	0.0%
src/components/Modals/DetailModal/DetailModal.tsx	0	2	0.0%
src/utils/getGlagolitic/getGlagolitic.ts	0	7	0.0%
src/utils/getLatin/getLatin.ts	0	7	0.0%
src/utils/getCyrillic/getCyrillic.ts	0	8	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/services/dictionary.ts	1	0%
src/utils/getLatin/index.ts	1	0%
src/utils/markFluentVowel/index.ts	1	0%
src/utils/wordDetails/index.ts	1	0%
src/utils/getLatin/getLatin.ts	2	0%
src/utils/markFluentVowel/markFluentVowel.ts	13	0%
src/utils/wordDetails/wordDetails.ts	56	0%

Totals
Change from base Build 4800820074:	-27.0%
Covered Lines:	78
Relevant Lines:	2859

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💛 - Coveralls