chore: add .gitattributes to normalize line endings in dist/

ncc 0.38's output contains 451 source-embedded CR bytes inside string
literals (aws-sdk transitive deps). When dist/ is committed through
git's default line-ending normalization, those CRs are stripped into
the blob, but every subsequent 'npm run package' reproduces them —
creating a permanent, symmetric 451/451 diff that the verify-dist CI
gate correctly flagged as drift.

Mark the whole dist/ tree as binary via .gitattributes so git never
converts line endings in that path. What ncc writes is what git
stores; CI's rebuild produces byte-identical output.

Signed-off-by: yuriyryabikov <22548029+kurok@users.noreply.github.com>

Author: kurok

.gitattributes

@@ -0,0 +1,6 @@
+# ncc-bundled output contains source-embedded CR bytes inside string
+# literals (aws-sdk deps, etc.). Treat the whole dist/ tree as binary
+# so git's autocrlf doesn't strip them on commit, which otherwise
+# produces a permanent mismatch between the committed blob and a
+# fresh `npm run package` rebuild.
+dist/** -text