Fix MCP dep tool parameter names to match CLI (issue_id/depends_on_id)

- Changed from confusing from_id/to_id to clear issue_id/depends_on_id
- Matches CLI convention: bd dep add [issue-id] [depends-on-id]
- Updated all tests and implementations
- Fixes GH #113 where Claude Code was creating dependencies backwards

Closes bd-58

Amp-Thread-ID: https://ampcode.com/threads/T-f01aca11-a10f-4908-9ce6-7e1734f2068f
Co-authored-by: Amp <amp@ampcode.com>

integrations/beads-mcp/src/beads_mcp/bd_client.py

@@ -498,8 +498,8 @@ class BdCliClient(BdClientBase):
             self.bd_path,
             "dep",
             "add",
-            params.from_id,
-            params.to_id,
+            params.issue_id,
+            params.depends_on_id,
             "--type",
             params.dep_type,
             *self._global_flags(),