Add sap-hana-cli plugin (#1616)

* Add sap-hana-cli plugin

150+ SAP HANA database tools for AI assistants. Pinned at 160ae47e.

Held: this PR is on hold pending an upstream plugin.json fix in
SAP-samples/hana-cli-claude-plugin#2 (the upstream repo uses the
npm-style {type, url} form for `repository`; Claude's plugin schema
requires the string form).

Once that lands, bump the SHA pin here to the merge commit and re-run CI.

Other SAP namespace work that was previously bundled in this PR has been
split into:
  - #1777 add sap-fiori-mcp-server
  - #1778 add sap-cds-mcp + author block on cds-mcp
  - #1779 align SAP author blocks on sap-mdk-server, ui5, ui5-typescript-conversion

* chore(sap-hana-cli): bump source SHA to abadd0a (upstream fixed repository field to string)

Upstream SAP-samples/hana-cli-claude-plugin@abadd0a changes plugin.json
`repository` from an object to a string, resolving the validate failure
(repository: expected string, received object) that blocked #1616.

.claude-plugin/marketplace.json

@@ -2588,6 +2588,22 @@
       },
       "homepage": "https://github.com/SAP/open-ux-tools/tree/main/packages/fiori-mcp-server"
     },
+    {
+      "name": "sap-hana-cli",
+      "description": "150+ SAP HANA database tools for AI assistants. Query tables, import/export data, profile data quality, compare schemas, manage backups, monitor performance, and more. Connects to SAP HANA Cloud and on-premise databases.",
+      "author": {
+        "name": "SAP SE",
+        "email": "ospo@sap.com",
+        "url": "https://www.sap.com"
+      },
+      "category": "database",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/SAP-samples/hana-cli-claude-plugin.git",
+        "sha": "abadd0aba32792b6378ed784e9f6d3e5b25dfc2a"
+      },
+      "homepage": "https://github.com/SAP-samples/hana-cli-claude-plugin"
+    },
     {
       "name": "sap-mdk-server",
       "description": "MCP server for SAP Mobile Development Kit (MDK). Build and modify MDK applications with AI assistance — schema lookups, action validation, rule editing, and project scaffolding.",