CLI: Add label option in wslc run/create

[AmelBawa-msft]

Summary of the Pull Request

• Add label option in wslc run/create

PR Checklist

• Closes: Link to issue #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[Copilot]

Pull request overview

Adds first-class --label support to WSLC container run/create, including parsing/validation and surfacing labels via container inspect, with corresponding unit + E2E coverage.

Changes:

• Add --label (-l) argument support to wslc container run and wslc container create, wiring through to container creation.
• Extend InspectContainer schema/output to include container labels (excluding internal metadata labels).
• Add unit tests for label/driver-opt parsing and E2E tests validating labels round-trip via container inspect.

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
test/windows/wslc/e2e/WSLCE2EVolumeCreateTests.cpp	Updates expected help text to reflect -l,--label and new description.
test/windows/wslc/e2e/WSLCE2EContainerRunTests.cpp	Adds E2E test for labels on container run and updates help expectation.
test/windows/wslc/e2e/WSLCE2EContainerCreateTests.cpp	Adds E2E test for labels on container create and updates help expectation.
test/windows/wslc/WSLCCLIOptionsParserUnitTests.cpp	New unit tests for driver option parsing (DriverOption::Parse).
test/windows/wslc/WSLCCLILabelParserUnitTests.cpp	New unit tests for label parsing/validation (Label::Parse).
src/windows/wslcsession/WSLCContainer.cpp	Populates InspectContainer.Labels from stored labels (filtering internal metadata).
src/windows/wslc/tasks/VolumeTasks.cpp	Switches volume opt/label parsing to DriverOption::Parse / Label::Parse.
src/windows/wslc/tasks/ContainerTasks.cpp	Parses --label args into ContainerOptions.Labels.
src/windows/wslc/services/VolumeModel.h	Introduces Label and DriverOption parsing helpers + stores labels/opts as key/value pairs.
src/windows/wslc/services/VolumeModel.cpp	Implements Label::Parse and DriverOption::Parse (incl. empty-key validation for labels).
src/windows/wslc/services/ContainerService.cpp	Passes labels through to WSLCContainerLauncher during container creation.
src/windows/wslc/services/ContainerModel.h	Adds Labels to ContainerOptions.
src/windows/wslc/commands/ContainerRunCommand.cpp	Exposes ArgType::Label for container run.
src/windows/wslc/commands/ContainerCreateCommand.cpp	Exposes ArgType::Label for container create.
src/windows/wslc/arguments/ArgumentDefinitions.h	Defines label as -l,--label and switches description to localized string.
src/windows/inc/wslc_schema.h	Adds Labels to InspectContainer JSON schema/serialization.
localization/strings/en-US/Resources.resw	Adds localized strings for label arg description and empty-key error.

[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated no new comments.

[OneBlue]

Could we use the same type for both of those ? Something like KeyValuePair ?

[OneBlue]

Or alternatively we could use std::pair for this (this would have the benefit of removing the copy that Key() and Value() do on return in the current implementation)