feat: support rendering template files on target host with sealctl

[fengxsong]

🤖 Generated by Copilot at 7dff684

Summary

🎨🐛📁

This pull request improves the code quality and functionality of the sealos project. It simplifies the creation of init system subcommands, updates the rootfs package to use the filepath package and the sealctl render command, adds a new file matching function to the file package, implements a new render command for sealctl, removes an unused function from the template package, and fixes a bug in the yaml package.

sealctl render command
adds template power to cmd
autumn leaves fall fast

Walkthrough

• Add a new render command for sealctl that renders template files with values and envs (link)
• Refactor the init system commands to use a helper function that reduces code duplication and improves readability (link, link, link)
• Execute the sealctl render command on the remote nodes after copying the files to the target directories in the rootfs package (link, link, link)
• Remove the unused and redundant ParseFiles function from the template package (link)
• Fix a bug in the unmarshalStrict function in the yaml package that returns the wrong error variable (link)
• Replace the path package with the filepath package in the rootfs and file packages, which is more appropriate for manipulating file paths across different operating systems (link, link, link)
• Remove the unnecessary getClusterName function from the defaultRootfs struct (link)
• Rename the variable clusterName to pathResolver in the rootfs package, which is more descriptive of its role as a path resolver for the cluster (link)
• Add a TODO comment to remove the loop over the mounts when rendering on the client side is GA in the rootfs package, which indicates a future improvement plan (link)
• Add the FindFilesMatchExtension function to the file package, which returns a slice of file paths that match the extensions (link)

[sealos-ci-robot]

🤖 Generated by lychee action

Summary

Status	Count
🔍 Total	932
✅ Successful	392
⏳ Timeouts	0
🔀 Redirected	0
👻 Excluded	539
❓ Unknown	0
🚫 Errors	0

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[codecov]

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[sealos-ci-robot]

/cherry-pick release-v4.4

[sealos-ci-robot]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/labring/sealos/actions/runs/6120751789