Add rule for filname case convention

[mpfeil]

Introduces new eslint rules that files should be named kebab case style.

Also all files were renamed violating this rule. Files within the /app/routes folder are ignore because we have some remix.run specific conventions.

This PR is skipping rules for variables because it is pretty hard to configure. So please stick to the convention describe in the issue.

Components and named exports should be named: PascalCase e.g. AlertDialog, DropdownMenu (https://betterprogramming.pub/string-case-styles-camel-pascal-snake-and-kebab-case-981407998841)

⚠️ Also be aware if you create a new component within a new folder don´t name them identically.
For example: You want to include a DatePicker component

You have the following options:

• Create a file named date-picker.tsx at /app/components
  or
• Create a folder named date-picker at /app/components
• Create a file called index.tsx within the date-picker folder and export the component inside the index.tsx

Closes #22

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Name	Status	Preview	Comments	Updated (UTC)
frontend	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 28, 2023 0:19am

[mpfeil]

Close in favor of #34