spf: add page and Chinese translation

[yorukot]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

[CLAassistant]

All committers have signed the CLA.

[spageektti]

Hi. Thanks for your contribution.

[tldr-bot]

The build for this PR failed with the following error(s):

pages/common/spf.md:3: TLDR003 Descriptions should start with a capital letter

Please fix the error(s) and push again.

[Managor]

Please don't force push. It can erase history and it's nice to know what changes were made after what comments.

[yorukot]

Please don't force push. It can erase history and it's nice to know what changes were made after what comments.

Oh, I see. Sorry about that! I was just trying to keep the commit history clean.

[Managor]

That won't be an issue as we squash and merge every pull request.

[Managor]

These will allow the client to show either new user friendly long versions or power user friendly short versions

[yorukot]

Hi! I’ve updated the PR based on your feedback.

• I’ve adjusted the request as suggested.
• Also, I revised the description for the --chooser-file option to make it clearer.

Let me know if there’s anything else that should be improved. Thanks again for your review!

[Managor]

Next time it would be nice to first submit just the english page and then make a second PR for translations once the page is pulled. That way you have to hash out these things only once.

[Managor]

That looks good to me. Now we will have to wait to hear a word from our translation maintainers. Chinese translators aren't that active so it'll likely take a week before we can merge this.

[MachiavelliII]

Thanks for your contribution.

[Managor]

I'll go ahead and merge. Thank you for your first contribution and welcome to the project. Send a PR any time to adjust these pages if you feel like they could be better.