Add karmadactl addons subcommand docs

[ONE7live]

Signed-off-by: ONE7live wangqi_yewu@cmss.chinamobile.com

What type of PR is this?
/kind documentation

What this PR does / why we need it:
Add karmadactl addons subcommand docs, refer to karmada-io/karmada#2134

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

[karmada-bot]

Welcome @ONE7live! It looks like this is your first PR to karmada-io/website 🎉

[RainbowMango]

/assign

[RainbowMango]

Thanks @ONE7live for doing this.

I'm thinking if we need a separate document for karmadactl functionality.
@lonelyCZ Any suggestions?

[lonelyCZ]

I'm thinking if we need a separate document for karmadactl functionality.

Yes, there could be an exclusive catalogue for karmadactl to describe the necessary subcommands(not only options but also usage example).

[ONE7live]

@RainbowMango @lonelyCZ Can we give an example first? Then resolve it with a new Issue and PR. Because in my opinion, the complete karmadactl function documentation needs enough time to write, during which we still need to explain some functions (such as addons)，what do y'all think?

[lonelyCZ]

Because in my opinion, the complete karmadactl function documentation needs enough time to write, during which we still need to explain some functions (such as addons)，what do y'all think?

Don't need complete doc. We can add it one by one. Like

cc @RainbowMango

[RainbowMango]

I want to get @Poor12's opinion.

[Poor12]

Maybe we can refer to https://kubernetes.io/docs/reference/kubectl/ about kubectl. We need a command guide for every subcommand and options(it's more like a generated thing). Also we need to provide some usage conventions about how to use it.
In this case, we can move karmadactl directory to reference.

[RainbowMango]

Yeah, I agree with @Poor12. CLI not used only by administrators.

So, please @Poor12 help to set up the initial page and make a room for addons.

[lonelyCZ]

Maybe we can refer to https://kubernetes.io/docs/reference/kubectl/ about kubectl. We need a command guide for every subcommand and options(it's more like a generated thing).

karmada-io/karmada#2260 planed to import it, but we were going to import it when the cli more stable, what do you think?

[RainbowMango]

Thanks for reminding me. That's the approach to automatically generate the docs, not sure if we can customize the doc a little bit such as adding more examples.

I'll look at it later.

[Poor12]

#176 move karmadactl manual to reference. Guess it's time to complete the karmadactl guide. I created three files to store karmadactl's options, subcommands and best practices.

[karmada-bot]

@ONE7live: Adding label do-not-merge/contains-merge-commits because PR contains merge commits, which are not allowed in this repository.
Use git rebase to reapply your commits on top of the target branch. Detailed instructions for doing so can be found here.

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[ONE7live]

Great, I'll resubmit a PR to refine it