Add documentation for languageTabs and request method labels.

[homotechsual]

Description

This documents setting the languageTabs and customising the request method labels.

Motivation and Context

Documentation only change to document language tabs and request method label css.

How Has This Been Tested?

N/A

Types of changes

• Documentation: Changes to documentation content only.

Checklist

• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes if appropriate.
• All new and existing tests passed.

[github-actions]

Visit the preview URL for this PR (updated for commit b96e7fd):

https://docusaurus-openapi-36b86--pr256-7ubaema2.web.app

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[sserrata]

Looks great! Only a couple of minor changes requested:

• Can we revert docusaurus.config.js changes? It appears powershell was added although not yet supported.
• Could we rename "customisation" to "customization" for consistency?

[homotechsual]

Should have just those requested changes now @sserrata :-)

[sserrata]

I just noticed that languagetabs.md is still referencing "powershell" in the example. Probably best to clean that up as well. Thanks!

[sserrata]

By the way, we can definitely add support for "powershell". I would have already included it but I couldn't find a suitable SVG icon on DEVICON.

[sserrata]

🚀

[homotechsual]

There is a PowerShell icon accepted into DEVICON's develop branch!