ESPHome external component for Samsung 2x20 serial VFD

Component (components/samsung_vfd), example device config, README and
CLAUDE.md.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,11 @@
+# ESPHome build output
+.esphome/
+**/.esphome/
+
+# Real credentials never go in the repo; see examples/secrets.yaml.example
+secrets.yaml
+
+__pycache__/
+*.pyc
+.vscode/
+.idea/