feat(AppProject): Add sync window description

[speedfl]

Closes [#20723]

Checklist:

• [x] 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.
• [x] The title of the PR states what changed and the related issues number (used for the release note).
• [x] The title of the PR conforms to the Toolchain Guide
• [x] I've included "Closes [ISSUE #]" or "Fixes [ISSUE #]" in the description to automatically close the associated issue.
• [x] I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• [x] Does this PR require documentation updates?
• [x] I've updated documentation as required by this PR.
• [x] 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.
• [x] My build is green (troubleshooting builds).
• [x] My new feature complies with the feature status guidelines.
• [x] I have added a brief description of why this PR is necessary and/or what this PR solves.
• [x] Optional. My organization is added to USERS.md.
• [x] Optional. For bug fixes, I've indicated what older releases this fix should be cherry-picked into (this may or may not happen depending on risk/complexity).

apiVersion: argoproj.io/v1alpha1
kind: AppProject
metadata:
  creationTimestamp: "2024-04-17T19:11:34Z"
  generation: 4
  name: gpg
  namespace: argocd-e2e
  resourceVersion: "3198389"
  uid: 44474152-edb7-4c40-adff-e04c5c2b3d90
spec:
  clusterResourceWhitelist:
  - group: '*'
    kind: '*'
  destinations:
  - namespace: '*'
    server: '*'
  signatureKeys:
  - keyID: D56C4FCA57A46444
  sourceNamespaces:
  - argocd-e2e-external
  sourceRepos:
  - '*'
  syncWindows:
  - applications:
    - aaa-*
    description: Ticket 123456
    duration: 57m
    kind: deny
    schedule: '* * * * *'
    timeZone: UTC
  - applications:
    - bbbb-*
    duration: 58m
    kind: allow
    schedule: '* * * * *'
    timeZone: UTC
status: {}

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[OpenGuidou]

LGTM !

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 53.84615% with 6 lines in your changes missing coverage. Please review.

Project coverage is 55.21%. Comparing base (993d79c) to head (9f449a3). Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/argocd/commands/projectwindows.go	0.00%	3 Missing :warning:
pkg/apis/application/v1alpha1/types.go	62.50%	2 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #20766 +/- ## ========================================== - Coverage 55.21% 55.21% -0.01% ========================================== Files 324 324 Lines 55256 55266 +10 ========================================== + Hits 30508 30513 +5 - Misses 22133 22134 +1 - Partials 2615 2619 +4 ```

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[neith00]

I feel like this field should be limited in length. What about 64 or 255 Bytes?