chore: add links to form integration examples to ChipSelect docs

[kurtdoherty]

This PR

• Adds links to example integrations with Formik and React Hook Form to the ChipSelect docs.
• Small scout to export the chip select's context, as well as make it available via ChipSelect.Context and ChipSelect.useContext.

[rpt-uk-github]

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Coverage summary from Codacy

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Coverage variation	Diff coverage
Report missing for 75801801	✅ 100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (7580180)	Report Missing	Report Missing	Report Missing
Head commit (6840954)	9206	8516	92.50%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#762)	3	3	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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