Increase consistency in UI around the concept of a "project"

System details:

Positron and OS details:

Interpreter details:

Describe the issue:

Positron uses a few different terms to refer to a "project":

• A Project, ie a project root folder that when created goes through the R, Python or other type flow
• A folder, ie a project root folder that is blank at startup
• A Workspace, ala VS Code

A VS Code "workspace" is usually just your project root folder. Workspace settings as well as debugging and task configurations are stored at the root in a .vscode folder. – VS Code docs

This can be a bit confusing in different ways:

• "New Folder" already exists in the Explorer UI, but always refers to a subfolder from within a Workspace/root folder.
• What is the difference between a Project or a Folder? Does one contain a dot-file?
• RStudio users expecting equivalent to .Rproj
• VS Code users expecting a "Workspace"

Expected or desired behavior:

It might be preferable to settle on a single term, New Project or New Blank Project to replace the "New Project" and "New Folder" flows. Alternatively "New Workspace" or "New Blank Workspace"

Explorer flow

We also likely want to add a "New Project/Workspace" button to the Explorer, rather than relying on Open Folder:

Existing UI

Otherwise, there are a number of areas where the Folder name is used:

Were there any error messages in the UI, Output panel, or Developer Tools console?

Start by reviewing the Explorer UI and the existing New Project, New Folder, Open Folder, and Workspace terminology described in the issue. First resolve which single term and flows maintainers want; done means the selected terminology is applied consistently across the referenced UI areas.