Lists the source files of the site's current editor version, with each file's path and size in bytes. File contents aren't included; use Get Vibe site file contents to read them.

• Only the visible source tree is listed: client/src/ and server/api/ for sites built on v1 templates, src/ for sites built on v2 templates.
• .gitkeep files, the site's form settings file (forms.json, which holds the owner's recipient addresses) and the generated database row types are never listed.
• path_prefix filters the list. A file is kept if its path starts with any of the prefixes. Without path_prefix, every visible file is listed.