refactor(loader): convert to typescript (FE-4804)

[grabkowski]

Proposed behaviour

All component files should be refactored and converted to TypeScript.

Current behaviour

Component files are currently javascript.

Checklist

• [x] Commits follow our style guide ~~- [ ] Related issues linked in commit messages if required~~ ~~- [ ] Screenshots are included in the PR if useful~~ ~~- [ ] All themes are supported if required~~
• [x] Unit tests added or updated if required ~~- [ ] Cypress automation tests added or updated if required~~ ~~- [ ] Storybook added or updated if required~~ ~~- [ ] Translations added or updated (including creating or amending translation keys table in storybook) if required~~
• [x] Typescript d.ts file added or updated if required

QA

• [ ] Tested in CodeSandbox/storybook
• [ ] Add new Cypress test coverage if required
• [ ] Carbon implementation matches Design System/designs
• [ ] UI Tests GitHub check reviewed if required

Additional context

Testing instructions

The following CodeSandbox is an example of the broken behaviour. You can see the new behaviour by looking at the version in the comment by codesandbox[bot].

[codesandbox-ci[bot]]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 6c904428d9284d747113a92fc4c1e7502c1eaece:

Sandbox	Source
carbon-quickstart	Configuration
carbon-quickstart-typescript	Configuration

[cypress[bot]]

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Test summary

2848 • 0 • 2 • 0 • 0

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Run details

Project	carbon
Status	Passed
Commit	6c904428d9
Started	Aug 19, 2022 10:18 AM
Ended	Aug 19, 2022 10:24 AM
Duration	05:52 💡
OS	Linux Debian - 10.10
Browser	Chrome 100

View run in Cypress Dashboard ➡️

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[carbonci]

:tada: This PR is included in version 110.1.2 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: