`CopySnippet`: convert to TypeScript (HDS-2689)

[KristinLBradley]

:pushpin: Summary

If merged, this PR converts the CopySnippet to TypeScript.

Note: Based off CopyButton branch: https://github.com/hashicorp/design-system/pull/2100 as they both share usage of hds-clipboard modifier

:link: External links

• Jira ticket: HDS-2689

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👀 Component checklist

• ~~[ ] Percy was checked for any visual regression~~
• [x] A changelog entry was added via Changesets if needed (see templates here)

:speech_balloon: Please consider using conventional comments when reviewing this PR.

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[KristinLBradley]

@didoo I've been trying to rebase this branch onto hds-2688-copy-button-ts-conversion but keep getting conflicts and when I try to fix the conflicts and continue rebasing the conflicts re-occur.

[didoo]

@didoo I've been trying to rebase this branch onto hds-2688-copy-button-ts-conversion but keep getting conflicts and when I try to fix the conflicts and continue rebasing the conflicts re-occur.

For future reference: this was fixed yesterday with a rebase of the branch hds-2689-copy-snippet-ts-conversion on hds-2688-copy-button-ts-conversion (and in the process of fixing conflicts I've merged and/or cleaned up a few commits) and then messaged Kristin to let her know.