Refactor & Tidy

[Buried-In-Code]

• Add testing Github workflow
• Add publishing Github workflow
• Replace Yaml Settings with Toml (settings.yaml => settings.toml)
• Fix naming confusion by changing dex_starr.metadata.* => dex_starr.schemas.*
• Create base Xml and Json models
• Create/Split schema files into .schema and .enum files
• Tiding/Rewriting/Updating ComicInfo, MetronInfo, Metadata schemas
• Try to tidy/simplify conversion between schemas
• Update services to replace filled fields instead of adding
• Change build backend to hatchling
• Update dependencies
• Fix invalid Py3.7 requirement
• Add Py3.11 support
• Update ComicInfo.xsd, MetronInfo.xsd and Metadata.schema.json
• Add schema testing
• Updated output messages
• Changed sorting to natsort