config: Restrict .JETLSConfig.toml to workspace root only

Use RelativePattern for file watching to ensure .JETLSConfig.toml is
only recognized in the workspace root directory. Previously, config
files in subdirectories were also loaded due to the "**/" glob pattern,
which was inconsistent with the documentation.

Author: aviatesk

CHANGELOG.md

@@ -16,6 +16,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Commit: [`HEAD`](https://github.com/aviatesk/JETLS.jl/commit/HEAD)
 - Diff: [`aae52f5...HEAD`](https://github.com/aviatesk/JETLS.jl/compare/aae52f5...HEAD)
 
+### Fixed
+
+- `.JETLSConfig.toml` is now only recognized at the workspace root.
+  Previously, config files in subdirectories were also loaded, which was
+  inconsistent with [the documentation](https://aviatesk.github.io/JETLS.jl/release/configuration/#config/file-based-config).
+
 ### Internal
 
 - Added heap snapshot profiling support. Create a `.JETLSProfile` file in the

src/did-change-watched-files.jl

@@ -12,7 +12,9 @@ function did_change_watched_files_registration(server::Server)
         registerOptions = DidChangeWatchedFilesRegistrationOptions(;
             watchers = FileSystemWatcher[
                 FileSystemWatcher(;
-                    globPattern = "**/$CONFIG_FILE",
+                    globPattern = RelativePattern(;
+                        baseUri = root_uri,
+                        pattern = CONFIG_FILE),
                     kind = WatchKind.Create | WatchKind.Change | WatchKind.Delete),
                 FileSystemWatcher(;
                     globPattern = RelativePattern(;