build: remove the build task from postinstall

[castastrophe]

Description

This update removes the build from the postinstall task and updates documentation to ensure users are running the build after install manually. This also updates CI to ensure the build is completed during validations.

Motivation and context

Postinstall scripts make installs slower and riskier; additionally, postintall scripts do not report their output to the console out-of-the-box so any failures would happen quietly and be difficult to debug.

How has this been tested?

• Expect the install process not to run the build. After a clean install, expect to see packages/accordion/src/Accordion.ts but not packages/accordion/src/Accordion.js.
  1. git clean -dfX
  2. yarn install
• Expect the build to create assets when run manually. After the build, expect to see packages/accordion/src/Accordion.js.

Types of changes

• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)

Checklist

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• If my change required a change to the documentation, I have updated the documentation in this pull request.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have reviewed at the Accessibility Practices for this feature, see: Aria Practices

Best practices

This repository uses conventional commit syntax for each commit message; note that the GitHub UI does not use this by default so be cautious when accepting suggested changes. Avoid the "Update branch" button on the pull request and opt instead for rebasing your branch against main.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 5b20b1a

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

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[github-actions]

Branch preview

• Documentation Site
• Storybook

Review the following VRT differences

When a visual regression test fails (or has previously failed while working on this branch), its results can be found in the following URLs:

• Spectrum | Light | Medium | LTR
• Spectrum | Dark | Large | RTL
• Express | Light | Medium | LTR
• Express | Dark | Large | RTL
• Spectrum-two | Light | Medium | LTR
• Spectrum-two | Dark | Large | RTL
• High Contrast Mode | Medium | LTR

If the changes are expected, update the current_golden_images_cache hash in the circleci config to accept the new images. Instructions are included in that file.
If the changes are unexpected, you can investigate the cause of the differences and update the code accordingly.

[github-actions]

Tachometer results

Currently, no packages are changed by this PR...

[coveralls]

Pull Request Test Coverage Report for Build 13970585113

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.002%) to 97.979%

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Totals
Change from base Build 13968663056:	-0.002%
Covered Lines:	33672
Relevant Lines:	34170

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💛 - Coveralls

[castastrophe]

The husky updates here align with the documentation: https://typicode.github.io/husky/how-to.html

Yarn does not support prepare commands.

[TarunAdobe]

@castastrophe can you please take a look at these failing tests

[castastrophe]

@TarunAdobe I already did and they appear connected to the typical flakiness of CI. I didn't see anything related to what this PR is updating.