Add support for nar files. (#1727)

- Update README.md to show that nar is now supported.
- Created a java-archives/example.nar so that the tests wouldn't break.
- Add nar glob and as an option for pkgType.

Closes #1701

Signed-off-by: Shane Dell <shanedell100@gmail.com>

syft/pkg/cataloger/java/archive_filename_test.go

@@ -79,6 +79,13 @@ func TestExtractInfoFromJavaArchiveFilename(t *testing.T) {
 			name:      "pkg-extra-field-maven",
 			ty:        pkg.JavaPkg,
 		},
+		{
+			filename:  "pkg-extra-field-maven-4.3.2-rc1.nar",
+			version:   "4.3.2-rc1",
+			extension: "nar",
+			name:      "pkg-extra-field-maven",
+			ty:        pkg.JavaPkg,
+		},
 		{
 			filename:  "/some/path/pkg-extra-field-maven-4.3.2-rc1.jpi",
 			version:   "4.3.2-rc1",