docs: Add server-side apply proposal

[leoluz]

Signed-off-by: Leonardo Luz Almeida leonardo_almeida@intuit.com

ArgoCD Server-Side Apply proposal

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• I've included "Closes [ISSUE #]" or "Fixes [ISSUE #]" in the description to automatically close the associated issue.
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• Optional. My organization is added to USERS.md.
• I have signed off all my commits as required by DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My build is green (troubleshooting builds).

[codecov]

Codecov Report

Merging #8812 (7b7c093) into master (b2fe209) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #8812   +/-   ##
=======================================
  Coverage   45.77%   45.77%           
=======================================
  Files         222      222           
  Lines       26372    26372           
=======================================
  Hits        12072    12072           
  Misses      12651    12651           
  Partials     1649     1649           

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[todaywasawesome]

Benefits are clear, the behavior will be substantially better. I'm in favor.

[alexmt]

Thank you for addressing comments @leoluz ! LGTM

[inductor]

What’s the current status of this PR? :)

[EppO]

@inductor: PR for server-side apply: #9711