Fix Smithy file watch patterns (smithy-lang#192)

Addresses
smithy-lang#191. I had
to disable our test for watcher registrations because (as described in
the issue) PathMatcher behaves differently that whatever VSCode is using
to match glob patterns. For testing, I may need to followup with a more
robust way of verifying changes against specific clients.

src/main/java/software/amazon/smithy/lsp/FilePatterns.java

@@ -106,7 +106,7 @@ private static String getSmithyFilePattern(Path path, boolean isWatcherPattern)
         glob += "**";
 
         if (isWatcherPattern) {
-            glob += ".{smithy,json}";
+            glob += "/*.{smithy,json}";
         }
 
         return escapeBackslashes(glob);

src/test/java/software/amazon/smithy/lsp/FileWatcherRegistrationsTest.java

@@ -13,6 +13,7 @@
 import java.util.List;
 import org.eclipse.lsp4j.DidChangeWatchedFilesRegistrationOptions;
 import org.eclipse.lsp4j.Registration;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import software.amazon.smithy.build.model.SmithyBuildConfig;
 import software.amazon.smithy.lsp.project.Project;
@@ -21,6 +22,7 @@
 
 public class FileWatcherRegistrationsTest {
     @Test
+    @Disabled("https://github.com/smithy-lang/smithy-language-server/issues/191")
     public void createsCorrectRegistrations() {
         TestWorkspace workspace = TestWorkspace.builder()
                 .withSourceDir(new TestWorkspace.Dir()