Add stock scoring commands

skills/openstock-agent-cli/references/commands/score/get/guide.md

@@ -0,0 +1,17 @@
+# `openstock score get`
+
+Purpose: read a saved stock evaluation score.
+
+Usage:
+
+```bash
+openstock score get 005930
+```
+
+Inputs: `symbol`.
+
+Reads: `~/.config/openstock/scores.json`.
+
+Output fields: `path`, `symbol`, `score`, `updated_at_unix`.
+
+Agent rule: if the command fails with no saved score, do not infer a score of 0.