Add builds find, --commit filter, and --workflow-name lookup

- builds find <sha>: search across all products/workflows for a build
  matching a commit SHA prefix, show details and errors if failed
- builds list --commit <sha>: client-side filter by commit SHA prefix
- builds list --workflow-name <name> --product <id>: resolve workflow
  by name instead of requiring the workflow ID

Author: emoryalimam

README.md

@@ -29,6 +29,7 @@ xcodecloud
 │   └── get <id>           → Get details for a workflow
 ├── builds
 │   ├── list --workflow <id>→ List build runs for a workflow
+│   ├── find <commit-sha>  → Find a build by commit SHA
 │   ├── get <id>           → Get details for a build run
 │   ├── start <workflow-id>→ Start a new build run
 │   ├── watch <build-id>  → Watch a build until completion
@@ -287,15 +288,27 @@ xcodecloud workflows get <workflow-id>
 #### Builds
 
 ```bash
-# List builds for a workflow (--workflow is required)
+# List builds for a workflow (--workflow or --workflow-name is required)
 xcodecloud builds list --workflow <workflow-id>
 
+# List builds by workflow name (instead of ID)
+xcodecloud builds list --product <product-id> --workflow-name "Release"
+
 # Filter by status (SUCCEEDED, FAILED, ERRORED, CANCELED, SKIPPED)
 xcodecloud builds list --workflow <workflow-id> --status failed
 
+# Filter by commit SHA
+xcodecloud builds list --workflow <workflow-id> --commit abc1234
+
 # Show only running builds
 xcodecloud builds list --workflow <workflow-id> --running
 
+# Find a build by commit SHA (searches across all products and workflows)
+xcodecloud builds find abc1234
+
+# Narrow the search to a specific product
+xcodecloud builds find abc1234 --product <product-id>
+
 # Get build details
 xcodecloud builds get <build-id>
 
@@ -423,14 +436,18 @@ List commands support client-side filtering. Filters are applied after fetching
 | `workflows list` | `--name <text>` | Filter by name (case-insensitive substring match) |
 | `workflows list` | `--enabled` | Show only enabled workflows |
 | `workflows list` | `--disabled` | Show only disabled workflows |
-| `builds list` | `--workflow <id>` | Workflow to list builds for (required) |
+| `builds list` | `--workflow <id>` | Workflow to list builds for (required unless using `--workflow-name`) |
+| `builds list` | `--workflow-name <name>` | Look up workflow by name (requires `--product`) |
+| `builds list` | `--product <id>` | Product ID (required with `--workflow-name`) |
 | `builds list` | `--status <status>` | Filter by completion status: `SUCCEEDED`, `FAILED`, `ERRORED`, `CANCELED`, `SKIPPED` |
 | `builds list` | `--running` | Show only builds currently in progress |
+| `builds list` | `--commit <sha>` | Filter by commit SHA prefix |
 
 Filters can be combined:
 
 ```bash
 xcodecloud builds list --workflow <id> --status failed
+xcodecloud builds list --workflow <id> --commit abc1234
 xcodecloud products list --name MyApp --type APP
 ```
 
@@ -458,6 +475,15 @@ xcodecloud builds get ghi789 -o table
 xcodecloud builds errors ghi789
 ```
 
+### Quick build lookup
+
+If you know the commit SHA, skip the product/workflow/build chain entirely:
+
+```bash
+# Find the build for a specific commit and see errors if it failed
+xcodecloud builds find abc1234
+```
+
 ### Scripting examples
 
 **Get the latest build status:**