feat(testmonitor): add product create, update, and delete commands (#72)

Add CRUD operations for Test Monitor products:

- product create: Create products with part number, name, family,
  workspace, keywords, and properties
- product update: Update existing products with merge or replace mode
- product delete: Delete single or multiple products with confirmation

Includes:
- 12 new unit tests (944 total passing)
- README documentation with usage examples
- SKILL.md updated with new command reference
- Proper error handling with ExitCodes
- Readonly mode checking
- JSON and table output formats

Author: fredvisser

README.md

@@ -1982,6 +1982,60 @@ slcli testmonitor product get 02600cf8-c2bb-4ff9-a139-031e943fb0c0
 slcli testmonitor product get 02600cf8-c2bb-4ff9-a139-031e943fb0c0 --format json
 ```
 
+### Create a product
+
+```bash
+# Create a new product (part number is required)
+slcli testmonitor product create --part-number "156502A-11L" --name "cRIO-9030" --family "cRIO"
+
+# Create with keywords and properties
+slcli testmonitor product create \
+  --part-number "156502A-11L" \
+  --name "cRIO-9030" \
+  --family "cRIO" \
+  --keyword "embedded" \
+  --keyword "controller" \
+  --property "region=us" \
+  --property "owner=team-a"
+
+# Create in a specific workspace
+slcli testmonitor product create --part-number "PN-001" --workspace "Production"
+
+# Output created product as JSON
+slcli testmonitor product create --part-number "PN-001" --name "My Product" --format json
+```
+
+### Update a product
+
+```bash
+# Update a product's name and family
+slcli testmonitor product update 02600cf8-c2bb-4ff9-a139-031e943fb0c0 --name "cRIO-9030 Rev B" --family "cRIO Gen2"
+
+# Merge additional keywords into an existing product
+slcli testmonitor product update 02600cf8-c2bb-4ff9-a139-031e943fb0c0 --keyword "v2" --keyword "updated"
+
+# Replace all properties (instead of merging) using --replace
+slcli testmonitor product update 02600cf8-c2bb-4ff9-a139-031e943fb0c0 \
+  --property "owner=team-b" \
+  --replace
+
+# Output updated product as JSON
+slcli testmonitor product update 02600cf8-c2bb-4ff9-a139-031e943fb0c0 --name "Updated" --format json
+```
+
+### Delete a product
+
+```bash
+# Delete a single product (prompts for confirmation)
+slcli testmonitor product delete 02600cf8-c2bb-4ff9-a139-031e943fb0c0
+
+# Delete without confirmation prompt
+slcli testmonitor product delete --yes 02600cf8-c2bb-4ff9-a139-031e943fb0c0
+
+# Delete multiple products at once
+slcli testmonitor product delete --yes prod-id-1 prod-id-2 prod-id-3
+```
+
 ### Get result details with steps and measurements
 
 ```bash

skills/slcli/SKILL.md

@@ -111,6 +111,30 @@ slcli testmonitor product list [OPTIONS]
 
 # Get a single product
 slcli testmonitor product get <PRODUCT_ID> [-f json]
+
+# Create a product
+slcli testmonitor product create --part-number TEXT [OPTIONS]
+  --part-number TEXT         # Part number (required)
+  --name TEXT                # Product name
+  --family TEXT              # Product family
+  --workspace, -w TEXT       # Workspace name or ID
+  --keyword TEXT             # Keyword (repeatable)
+  --property KEY=VALUE       # Key-value property (repeatable)
+  -f [table|json]
+
+# Update a product
+slcli testmonitor product update <PRODUCT_ID> [OPTIONS]
+  --name TEXT                # New product name
+  --family TEXT              # New product family
+  --workspace, -w TEXT       # New workspace name or ID
+  --keyword TEXT             # Keyword (repeatable; replaces all if --replace)
+  --property KEY=VALUE       # Key-value property (repeatable; replaces all if --replace)
+  --replace                  # Replace fields instead of merging
+  -f [table|json]
+
+# Delete products
+slcli testmonitor product delete [--yes] <PRODUCT_ID>...
+  --yes, -y                  # Skip confirmation prompt
 ```
 
 ### asset — Asset and calibration management