docs: add proposal of enhancing karmadactl

[hulizhe]

What type of PR is this? /kind feature

What this PR does / why we need it: Enhance karmadactl operation and maintenance experience

Which issue(s) this PR fixes: Parts of #5248

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 29.02%. Comparing base (5e3e5ad) to head (dcc0ad0). Report is 131 commits behind head on master.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5245 +/- ## ========================================== + Coverage 28.25% 29.02% +0.76% ========================================== Files 632 632 Lines 43739 43862 +123 ========================================== + Hits 12360 12729 +369 + Misses 30478 30218 -260 - Partials 901 915 +14 ``` | [Flag](https://app.codecov.io/gh/karmada-io/karmada/pull/5245/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=karmada-io) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/karmada-io/karmada/pull/5245/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=karmada-io) | `29.02% <ø> (+0.76%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=karmada-io#carryforward-flags-in-the-pull-request-comment) to find out more.

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[zhzhuang-zju]

/retest

[XiShanYongYe-Chang]

/assign /assign @chaunceyjiang /retest

[chaunceyjiang]

/assign

[hulizhe]

kindly ping @XiShanYongYe-Chang @chaunceyjiang @RainbowMango @zhzhuang-zju

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/karmada-io/karmada/blob/master/OWNERS)~~ [RainbowMango] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[zhzhuang-zju]

/retest