Support deleting folders

[isc-klu]

Major Changes

This PR fixes #1638.

Previously, the plugin only supported deletion of individual files. It now deletes all files whose paths start with the affected path:

• If the affected path points to a single file, that file is deleted (unchanged behavior).
• If the affected path is a directory, all files under that directory are deleted.

To support this, WSFolderIndex now stores mappings only for importable files (web app files and virtual documents).

Additional Changes

• Removed the “Launch Extension Alone” debug option, which is no longer valid since the extension now depends on InterSystems Server Manager.
• Simplified updateIndexForDocument(uri, docs?, uris?, content?) → updateIndex(uri, content?) because no external callers supply docs or uris.
• Simplified removeDocumentFromIndex(uri, docs?, uris?) → removeDocumentFromIndex(uri, docs, uris) since all callers supply the parameters.
• Simplified isClassOrRtn(uri | str) → isClassOrRtn(str) by requiring callers to handle the needed uri → string conversion.
• Renamed uriIsParentOf → uriContains because the function is checking the containment relationship (reflective, transitive closure of the parent relationship) rather than just the parent relationship.
• Loosen uriContains (previously, uriIsParentOf) to also return true when its inputs are identical documents rather than folders.
• Deduplicated the WSFolderIndex["documents"] and WSFolderIndex["uris"] types.
• Deduplicated a repeated check used for watcher.onDid{Change, Create, Delete}.
• Added Prettier as an optional dev dependency to match .vscode/settings.json and assist future contributors with linting.

[isc-bsaviano]

I downloaded the latest test VSIX for this PR (attached to this Actions run) and deletions weren't working for me at all. I deleted a individual routine from the files explorer, but it wasn't deleted on the server.

[isc-klu]

I downloaded the latest test VSIX for this PR (attached to this Actions run) and deletions weren't working for me at all. I deleted a individual routine from the files explorer, but it wasn't deleted on the server.

The recent commits fix a problem with deleting individual documents, which probably fix your problem. I incorrectly assumed that uriIsParentOf returns true when the two input URIs are identical. It's fixed now. Could you try again?

I tested with the following set up:

Both deletion of individual documents and deletion of the P1 folder work for me.

[isc-bsaviano]

I tested the latest VSIX. File and folder deletes both work. I tested with classes, a CSP file, and an abstract document. I did notice that getServerDocName() did not return the correct name for DFI files, but that issue is a separate issue that is not caused by this PR. Therefore I'll approve this and then look into that issue.