docs(insights): Add developer docs

[mhevery]

What is it?

• [ ] Feature / enhancement
• [ ] Bug
• [ ] Docs / tests / types / typos
• [ ] Infra

Description

Checklist:

• [ ] My code follows the developer guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have ran pnpm change and documented my changes
• [ ] I have made corresponding changes to the Qwik docs
• [ ] Added new tests to cover the fix / functionality

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: 1b2276f3fb39fa561aaea4ad3f592aeb4174eff8

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

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[pkg-pr-new[bot]]

Open in Stackblitz

npm i https://pkg.pr.new/@builder.io/qwik@6957

npm i https://pkg.pr.new/@builder.io/qwik-city@6957

npm i https://pkg.pr.new/eslint-plugin-qwik@6957

npm i https://pkg.pr.new/create-qwik@6957

commit: 1b2276f

[github-actions[bot]]

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