add stdin-filename support

[arahatashun]

What

add support for overwriting file names when using stdin.

Why

When I tried developing a VSCode extension for actionlint, I felt it would be helpful if we had this option.
FYI: https://github.com/fnando/vscode-linter/blob/main/docs/creating-linters.md

For example, eslint has this kind of option. https://eslint.org/docs/user-guide/command-line-interface#--stdin-filename

QA

With --stdin-filename

shun@Mac-mini actionlint % echo "foo"|  ./actionlint --stdin-filename "test.yml" -
test.yml:1:1: workflow is scalar node but mapping node is expected [syntax-check]
  |
1 | foo
  | ^~~
test.yml:1:1: "jobs" section is missing in workflow [syntax-check]
  |
1 | foo
  | ^~~

Without --stdin-filename

shun@Mac-mini actionlint % echo "foo"|  ./actionlint -
<stdin>:1:1: workflow is scalar node but mapping node is expected [syntax-check]
  |
1 | foo
  | ^~~
<stdin>:1:1: "jobs" section is missing in workflow [syntax-check]
  |
1 | foo
  | ^~~

[rhysd]

Could you rename this to StdinFileName since stdin is a single word (e.g. os.Stdin)?

[arahatashun]

Thank you for reviewing. I named it to StdinFileName.

[rhysd]

@arahatashun When you finish to build the VS Code plugin, I would be glad to hear that. I'll update document to include the URL to the project.

[rhysd]

Thanks!

[rhysd]

This change was included in the latest release v1.6.14.

[arahatashun]

Thank you for the quick release. I published the VSCode extension https://marketplace.visualstudio.com/items?itemName=arahata.linter-actionlint.

[rollingmoai]

@rhysd Can you add a reference to the vscode extension in the docs now?

[rhysd]

I'm sorry for catching the comment lately since this issue was already closed. I added description about the VS Code extension. Thank you for making it!

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