Remove MV2 code from "Create an extension tutorial, part 1"

[bhuvanapriyap]

This PR is finished & on-hold waiting for Extensions repo Part 1 to be updated from MV2 to MV3, per PR: microsoft/MicrosoftEdge-Extensions#202
manifest.json:
https://github.com/microsoft/MicrosoftEdge-Extensions/blob/main/Extension%20samples/extension-getting-started-part1/part1/manifest.json --
"manifest_version": 2,
When that line becomes "manifest_version": 3,, this PR can be merged.

Rendered articles for review:

• Tutorial part 1: Display an image in a pop-up (part1-simple-extension.md)
  • https://review.learn.microsoft.com/microsoft-edge/extensions-chromium/getting-started/part1-simple-extension?branch=pr-en-us-3277
  • Before/Live
  • Removed Manifest v2 code.
    • Removed tabset tagging.
    • Removed "The source code has been updated from Manifest V2 to Manifest V3."
  • Changed title from "Create an extension tutorial, part 1", to describe the extension.
  • Clarified intro to describe and show the Part 1 demo's UX.
  • Clearly recommended cloning the MicrosoftEdge-Extensions repo and installing and running the provided, completed demo.
    • Added how to clone the Extensions Samples repo.
    • Clarified how to obtain the image files.
    • Added section saying how to install and run/test the sample, with screenshots.
  • Reformatted plain sentences as numbered steps.
  • In manifest code, differentiated Name and Description of the Part 1 demo vs Part 2 demo.
  • Re-created screenshots and updated them, using a Microsoft-owned site, and added screenshots.
    • Added screenshot of the extension running.
• Tutorial part 2: Use JavaScript to insert an image in the webpage (part2-content-scripts.md)
  • https://review.learn.microsoft.com/microsoft-edge/extensions-chromium/getting-started/part2-content-scripts?branch=pr-en-us-3277
  • Before/Live
  • Removed note about using MV2 when creating a new extension.
  • Changed title from "Create an extension tutorial, part 2", to describe the extension.
  • Clarified intro to describe and show the Part 2 demo's UX.
  • Clearly recommended cloning the MicrosoftEdge-Extensions repo and installing and running the provided, completed demo.
  • In heading, changed "pop-up.html" (wrong filename) to "the webpage".
  • Added filename above each listing, & whether it's a portion or the complete listing.
  • In some steps, linked to "Sideload an extension to install and test it locally", to update & run the expanded sample.
  • Removed stray "8." step.
  • In manifest code, differentiated Name and Description of the Part 1 demo vs Part 2 demo.
  • Clarified how to install and run/test the sample.
    • Specified to first open a webpage; not an empty tab or utility page.
    • Added an h2 heading to form a Step section: Step 7: Install and test the extension.
    • Re-created screenshots and updated them, using a Microsoft-owned site, and added screenshots.
• Sideload an extension to install and test it locally (extension-sideloading.md)
  • https://review.learn.microsoft.com/microsoft-edge/extensions-chromium/getting-started/extension-sideloading?branch=pr-en-us-3277
  • Before/Live
  • Integrated with the tutorial articles, for better flow, comprehension, & maintainability.
    • Explicitly specified the "picture of the day" tutorial's extension, as a specific example to follow the steps end-to-end.
  • Changed title from "Sideload an extension", to state the task/ objective.
    • Rewrote intro to clarify the scenario, task, strategy, & objective.
  • Added the main h2 heading "Locally installing and running an extension".
    • Added how to run the installed extension.
    • Added step to open a webpage before running certain types of extensions (eg Part 2 demo).
    • Clarified the other h2 headings to clarify each task.
  • Re-created screenshots and updated them, using a Microsoft-owned site, and added screenshots.
• Microsoft Edge documentation (hub page for Edge docsets) (~/index.yml)
  • https://review.learn.microsoft.com/microsoft-edge/?branch=pr-en-us-3277
  • Before/Live
  • Updated the redirected url for macOS.
  • Changed "Port a Chromium extension to Microsoft Edge" to "Port a Chrome extension to Microsoft Edge".
• Microsoft Edge Developer documentation (landing page for entire docset) (/developer/index.yml)
  • https://review.learn.microsoft.com/microsoft-edge/developer/?branch=pr-en-us-3277
  • Before/Live
  • Changed "Port a Chromium extension to Microsoft Edge" to "Port a Chrome extension to Microsoft Edge".
• Microsoft Edge extensions documentation (landing page for Extensions) (/extensions/landing/index.yml)
  • https://review.learn.microsoft.com/microsoft-edge/extensions-chromium/landing/?branch=pr-en-us-3277
  • Before/Live
  • Lowercased "Extensions" in title of landing page.
  • Changed "Sideload an extension" to "Sideload an extension to install and test it locally".
• TOC (toc.yml)
  • https://review.learn.microsoft.com/microsoft-edge/extensions-chromium/landing/?branch=pr-en-us-3277
  • Before/Live
  • Changed "Sideload an extension" to "Sideload an extension to install and test it locally".

AB#54090321

[mikehoffms]

LGTM - Writer/Editor

[captainbrosset]

Approving the content changes, but we need to update the samples repo to v3 at the same time.

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Learn Build status updates of commit f63f101:

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[yvsubhash]

LGTM - Dev