[Fix] nvm_get_default_packages: ignore CRLF line endings

A `default-packages` file saved with Windows line endings left a carriage return on every package name,
and turned each blank line into a lone `\r` entry, so `npm install -g` was given `rimraf\r` and failed.
Strip a trailing `\r` from each line before parsing it,
like `.nvmrc` parsing already tolerates.

Assisted-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Wei-Lun Li <b84330808@gmail.com>

test/fast/Unit tests/nvm_get_default_packages

@@ -93,3 +93,13 @@ EXPECTED_PKGS=''
 touch "${FILE}"
 
 cleanup
+
+setup
+
+printf 'rimraf\r\nobject-inspect@1.0.2\r\n\r\n# commented-package\r\n\r\nstevemao/left-pad\r\n' > "${FILE}"
+
+DEFAULT_PKGS="$(nvm_get_default_packages)"
+EXPECTED_PKGS='rimraf object-inspect@1.0.2 stevemao/left-pad'
+[ "${DEFAULT_PKGS}" = "${EXPECTED_PKGS}" ] || die "6: expected default packages from a CRLF file >${EXPECTED_PKGS}<; got >${DEFAULT_PKGS}<"
+
+cleanup