Add rule to warn about new standard job creation

Triggers when a new job.yml is created in src/deepwork/standard_jobs/
to remind that standard jobs ship with DeepWork and should only be
created when explicitly requested (vs repository or library jobs).

Author: claude

.deepwork/rules/new-standard-job-warning.md

@@ -0,0 +1,16 @@
+---
+name: New Standard Job Warning
+created: src/deepwork/standard_jobs/*/job.yml
+compare_to: prompt
+---
+A new standard job is being created. Standard jobs are bundled with DeepWork and available to all users.
+
+**Before proceeding, verify this is intentional:**
+
+- **Standard jobs** (`src/deepwork/standard_jobs/`) - Ship with DeepWork, available globally
+- **Repository jobs** (`.deepwork/jobs/`) - Specific to a single repository
+- **Library jobs** - Installed from external packages
+
+Unless the user **explicitly requested** creating a new standard job (not just "a job" or "a new job"), this should likely be a **repository job** in `.deepwork/jobs/` instead.
+
+If uncertain, ask the user: "Should this be a standard job (shipped with DeepWork) or a repository-specific job?"