Adding my r-flowchart package

[pasahe]

Checklist

• Title of this PR is meaningful: e.g. "Adding my_nifty_package", not "updated meta.yaml".
• License file is packaged (see here for an example).
• Source is from official source.
• Package does not vendor other packages. (If a package uses the source of another package, they should be separate packages or the licenses of all packages need to be packaged).
• If static libraries are linked in, the license of the static library is packaged.
• Package does not ship static libraries. If static libraries are needed, follow CFEP-18.
• Build number is 0.
• A tarball (url) rather than a repo (e.g. git_url) is used in your recipe (see here for more details).
• GitHub users listed in the maintainer section have posted a comment confirming they are willing to be listed there.
• When in trouble, please check our knowledge base documentation before pinging a team.

I used the helper script to expedite the review process: conda_r_skeleton_helper

[github-actions]

Hi! This is the staged-recipes linter and I found some lint.

It looks like some changes were made outside the recipes/ directory. To ensure everything runs smoothly, please make sure that recipes are only added to the recipes/ directory and no other files are changed.

If these changes are intentional (and you aren't submitting a recipe), please add a maintenance label to the PR.

File-specific lints and/or hints:

• staged-recipes.Rproj:
  • lints:
    • Do not edit files outside of the recipes/ directory.

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/r-flowchart/meta.yaml) and found it was in an excellent condition.
I do have some suggestions for making it better though...

For recipes/r-flowchart/meta.yaml:

• License is not an SPDX identifier (or a custom LicenseRef) nor an SPDX license expression.

Documentation on acceptable licenses can be found here.

[github-actions]

Hi! This is the staged-recipes linter and your PR looks excellent! 🚀

[pasahe]

@conda-forge/help-r ready for review!