feat: baseline run:script, run:container and run:shell to support stdin and argv

[hirenr]

Please specify parts of this PR update:

• Specification
• Schema
• Examples
• Extensions
• Use Cases
• Community
• CTK
• Other

Discussion or Issue link:
Slack Discussion Link

What this PR does:
Update the run:* syntax to have a unified structure. Introduced parameters stdin, and updated arguments.

arguments as string[] passed as CLI args to run:shell / run:container / run:script underlying command
Pass stdin string via a new string property to the run:shell / run:container / run:script underlying command!

Additional information:
The advantages to the following are:

• No injection of code into scripts (for input args etc) and other underlying code!
• Makes the inline/referenced scripts fully portable without relying on the runtime
• Execution and passing of data to scripts similiar, with how it would work outside of a workflow environment. For eg. when running the script directly via node command.
• Input (via STDIN) and Output (via STDOUT, STDERR, CODE) more inline with each other.

[hirenr]

ref: #1128

[Copilot]

Pull Request Overview

This PR introduces unified support for stdin and arguments parameters across run:container, run:script, and run:shell tasks. The change standardizes how data is passed to these tasks by enabling input via standard input and command-line arguments, rather than injecting data into scripts.

Key Changes:

• Changed arguments from object type to string[] array for all three run task types
• Added new stdin property (type string) to pass data as standard input for all three run task types
• Updated examples to demonstrate the new unified syntax

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
schema/workflow.yaml	Updated schema definitions for container, script, and shell tasks to support stdin string property and changed arguments from object to string array
examples/run-shell-stdin-and-arguments.yaml	New example demonstrating shell task with stdin and arguments
examples/run-script-with-stdin-and-arguments.yaml	New example showing script task using stdin, arguments, and environment variables
examples/run-script-with-arguments.yaml	Removed old example that used object-based arguments (replaced by new unified syntax)
examples/run-container-stdin-and-arguments.yaml	New example demonstrating container task with stdin and arguments
dsl-reference.md	Updated documentation for all three run task types to reflect new stdin property and array-based arguments

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[ricardozanini]

Can youn take a look at the CI error?

[hirenr]

Fix added for CI error!

[Copilot]

Pull Request Overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

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[cdavernas]

LGTM! Cheers @hirenr ❤️

[ricardozanini]

@hirenr @cdavernas the merge is blocked because there's no verified signatures.

@hirenr you must have a GPG key locally and verify your signature accordingly, then you can squash and sign your commits and force push again so I can merge it. We can manually approve the DCO to get a green, but github/CNCF rules won't allow it if you don't have a local GPG key.