[doc] add product diagrams

[jcalcaben]

Description

• Add the product diagrams to appropriate topics in the doc site.
• Update topic content to reflect current state of the project.
• Clean up any linting errors in the modified topics.

Related Issue

Closes #1347

How have YOU tested this?

See verification steps

Verification Steps

1. Navigate to the pwa-devdocs directory
2. Run linter on the technology overview file:

   npm run lint src/technologies/overview/index.md

3. Verify no linting issues associated with this file.
4. Run linter on the tools and library file:

   npm run lint src/technologies/tools-libraries/index.md

5. Verify no linting issues associated with this file.
6. Build and run the preview server: npm run develop
7. Navigate to /technologies/overview/
8. Verify the developer overview image is on the page.
9. Navigate to /technologies/tools-libraries/
10. Verify the tools and technology image is on the page.

Checklist:

• I have updated the documentation accordingly, if necessary.
• I have added tests to cover my changes, if necessary.

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Latest deployment for this branch: https://venia-git-jimothy-gh-1347product-diagrams.magento-research1.now.sh

[PWAStudioBot]

	Messages
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[supernova-at]

Looks good to me!

[supernova-at]

What's the difference between a contributor and a front end developer?

[jcalcaben]

I see a contributor as also having backend scripting skills to work on packages such buildpack or upward-js

[supernova-at]

I was able to verify steps 1-5 but not past that (I may need Calcaben's help setting up my docs installation, I'm pretty sure it's something on my side).

As such, can whoever is QAing these please also run the verification steps?

[dpatil-magento]

@supernova-at I have that setup with bundler gem. So, you can skip these tickets to QA always. If you need bundler setup I can look into that as well.