Rename Volubilis/Wikipedia corpus function names for consistency / Fix types

[bact]

Also

• Add more corpus info to docstring
• Add get_corpus_as_is() which is the former get_corpus(as_is=True) to not mixing the return type
• Fix return type of provinces() - it must be List[dict] not List[str]
• Fix param type of version in corpus database functions, version: str can't be None
• Add type hints
• Add license info
• Deprecate thai_synonym(), use thai_synonyms() (plural) instead

Your checklist for this pull request

🚨Please review the guidelines for contributing to this repository.

• [x] Passed code styles and structures
• [ ] Passed code linting checks and unit test

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[coveralls]

coverage: 84.222% (-1.9%) from 86.156% when pulling 94ec1fc272295b3b7f73cb178703a0f67c7fd5d0 on bact:rename-corpus-volubilis-wikipedia into 297aadc4c3f52b3d3d2973aba95abc8f46d70b0a on PyThaiNLP:dev.