Fix the visible loading delay of the copy page button

[codedbychavez]

Describe the purpose of your pull request

This PR fixes the visible loading delay of the copy page button in which the button appears ~1 second after the page is loaded. This issue was reported to me after some QA checks from rest of the content team.

During research and brainstorming, I found that if the button element can be placed next to the H1 element in the source code, then the need for injecting it after the DOM is built would solve the visible delay.
This was accomplish by swizzling just the DocItem/Content component, so the copy page button can be included next to the page Heading.

Related issues (only if applicable)

n/a

How to test? (only if applicable)

Preview link: https://fix-copy-button-loading.docs-xmy.pages.dev/docs/advanced/caching/

What part of the application was affected by the changes?

• Every documentation page in the Docs

What should be tested?

• Check if the visible delay of the button is fixed by comparing it to the live Docs: https://configcat.com/docs/requests/

Requirement checklist

• I have validated my changes on a test/local environment.
• I have tested that the code snippets I added work. (Leave unchecked if there are no new code snippets.)
• I have added my changes to the V1 and V2 documentations.

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Preview URL:	https://2581213e.docs-xmy.pages.dev
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