Refs: #175676

• Windows @amunger
• macOS @ulugbekna
• Linux @rzhao271 @andreamah

Complexity: 4

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This milestone, we've integrated sharing links into additional entrypoints in our product surface area.

Setup:

• Install the pre-release of GitHub Pull Requests and Issues
• Install the pre-release of GitHub Repositories and Azure Repos
• Install the VS Code selfhost test provider

Testing:

• Right click on both the editor line number and gutter to bring up the context menu and verify that it contains the following entries:

• (macOS only): verify that ctrl+click behaves the same as right click
• Verify that the context menu does not interfere with your ability to use debug breakpoints or testing decorations
• Verify that you can use the copy _ link commands to generate links for a specific line and for a ranged selection from the editor gutter context menu, and that the ranges behave as expected
• Verify that the Copy GitHub link actions always generate github.com links even on vscode.dev, and the Copy vscode.dev link actions always generate vscode.dev links
• Verify that opening the copied links in vscode.dev or github.com works as expected
  • vscode.dev links generated for notebooks should deeplink to a specific notebook cell and line
• Repeat for the following newly added share submenus:
  • editor title context share submenu
  • explorer context share submenu
• Open the GitHub Pull Requests and Issues view. Verify that there is a new option to checkout a PR on vscode.dev (in addition to the existing option to checkout the PR locally), and that it behaves as expected
• Do some exploratory testing and make a note of any places where you would expect to find a share link but did not find one