chore: define the components using PascalCase

[meteorlxy]

• According to the vue guide - Component Naming Conventions:

  This means that the PascalCase is the most universal declaration convention and kebab-case is the most universal usage convention.

• According to the style guide - Component name casing in templates:

  In most projects, component names should always be PascalCase in single-file components and string templates - but kebab-case in DOM templates.