Extend FAQ documentation to add configuration Q&A pairs

[stichbury]

NOTE: Kedro datasets are moving from kedro.extras.datasets to a separate kedro-datasets package in
kedro-plugins repository. Any changes to the dataset implementations
should be done by opening a pull request in that repository.

Built docs are here

Description

In response to #2438 I have added links to "How to" Q&A pairs that were created for the configuration documentation.

This is all I'm doing in terms of FAQs right now.

There are other commonly answered questions but I'm going to raise issues to get these added to documentation separately as they arise, and some may be better included in the FAQ on the GitHub wiki for now, since that holds odds and ends of queries that don't fit within the docs.

Some, already known, are not docs issues such as dynamic pipelines, which highlight Kedro's philosophical stance so will be covered in a blog post.

Adding fix for missing permalink symbol

Thanks to @astrojuanlu there's a cherry-picked fix in here to add the missing symbol back to our permalinks.

Development notes

Linted, rebuilt locally, inspected docs.

Checklist

• Read the contributing guidelines
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added a description of this change in the RELEASE.md file
• Added tests to cover my changes

[merelcht]

LGTM! 👍

[astrojuanlu]

[noklam]

LGTM! thanks!