website/docs: Add ArgoCD documentation

[Unyxos]

Details

• Does this resolve an issue? Resolves #2863 by providing a complete guide on how to configure ArgoCD to work with Authentik, both web UI and CLI

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[codecov[bot]]

Codecov Report

Base: 92.15% // Head: 91.73% // Decreases project coverage by -0.42% :warning:

Coverage data is based on head (a17791c) compared to base (62f93c8). Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3553      +/-   ##
==========================================
- Coverage   92.15%   91.73%   -0.41%     
==========================================
  Files         456      460       +4     
  Lines       21981    22249     +268     
==========================================
+ Hits        20255    20409     +154     
- Misses       1726     1840     +114     

Flag	Coverage Δ
e2e	49.40% <ø> (?)
integration	28.80% <ø> (?)
unit	88.99% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
authentik/providers/oauth2/views/provider.py	60.72% <0.00%> (-39.28%)	:arrow_down:
authentik/policies/denied.py	57.70% <0.00%> (-38.46%)	:arrow_down:
authentik/providers/saml/views/sso.py	47.30% <0.00%> (-35.13%)	:arrow_down:
authentik/providers/saml/processors/metadata.py	65.00% <0.00%> (-35.00%)	:arrow_down:
authentik/providers/oauth2/views/github.py	66.67% <0.00%> (-33.33%)	:arrow_down:
authentik/core/views/session.py	69.24% <0.00%> (-30.76%)	:arrow_down:
authentik/policies/views.py	66.20% <0.00%> (-26.76%)	:arrow_down:
authentik/providers/saml/views/flows.py	55.18% <0.00%> (-22.41%)	:arrow_down:
authentik/lib/expression/evaluator.py	81.00% <0.00%> (-15.15%)	:arrow_down:
authentik/providers/proxy/models.py	87.94% <0.00%> (-12.06%)	:arrow_down:
... and 63 more

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[Unyxos]

Hey sorry just got to check this, I'll go through the comments to fix stuff :)