New Subhead Component - Multiple Curations - WSTEAMA-126

[pvaliani]

Resolves WSTEAMA-126

Overall change:

• Creates a new Subhead component

Code changes:

• This is the first WS TypeScript component for Simorgh
• Adds ts and tsx extensions to storybook config globs
• Adds ts and tsx extensions to jest config for unit tests
• Updates aliased component/hook paths which depend on psammead components to relative paths (temporarily until we refactor when the emotion styling component standards work is complete)
• Creates new Subhead component with storybook component, unit tests and separate co-located styling file

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• [x] I have assigned myself to this PR and the corresponding issues
• [ ] I have added the cross-team label to this PR if it requires visibility across World Service teams
• [ ] I have assigned this PR to the Simorgh project
• [x] (BBC contributors only) This PR follows the repository use guidelines

Testing:

• [x] Automated (jest and/or cypress) tests added (for new features) or updated (for existing features)
• [ ] If necessary, I have run the local E2E non-smoke tests relevant to my changes (CYPRESS_APP_ENV=local CYPRESS_SMOKE=false yarn test:e2e:interactive)
• [ ] This PR requires manual testing

[amoore108]

Couple of comments, but looks good, great job! 👍🏼