Init alpha usage of pipedv1 and plugins

[t-kikuc]

What this PR does:

as title

Why we need it:

Early users can try pipedv1 and plugins.

Which issue(s) this PR fixes:

Part of #5615

Note

• I'm undecided about where to locate this usage guide.

TODO :

• This page (in other PRs)
  • Configure app.pipecd.yaml: k8s stages in pipeline and plugins.kubernetes
  • Set the URLs in the piped-config.yaml (After releasing them)
• Outside this page
  • Release binaries of each plugin
  • Add config references for k8s, wait, example-stages plugins. (README in each dir?)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.85%. Comparing base (44a0c00) to head (8b8d6f6).
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5878   +/-   ##
=======================================
  Coverage   27.85%   27.85%           
=======================================
  Files         519      519           
  Lines       55793    55793           
=======================================
  Hits        15539    15539           
  Misses      39070    39070           
  Partials     1184     1184           

Flag	Coverage Δ
.	23.75% <ø> (ø)
.-pkg-app-pipedv1-plugin-example	0.00% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes	63.60% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	64.93% <ø> (ø)
.-pkg-app-pipedv1-plugin-wait	35.51% <ø> (ø)
.-pkg-plugin-sdk	49.25% <ø> (ø)
.-tool-actions-gh-release	19.58% <ø> (ø)
.-tool-actions-plan-preview	23.22% <ø> (ø)
.-tool-codegen-protoc-gen-auth	0.00% <ø> (ø)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[ffjlabo]

[imo] it would be nice to clarify that this doc is WIP for now.

[t-kikuc]

@ffjlabo thanks, i added:

This page is still in preparation. The content will be changed and might not work well yet.

fe000f3

[ffjlabo]

👍

[khanhtc1202]

@t-kikuc Nice work. My only concern is the name of the docs. I think renaming it to README.md is fine. The title of the docs speaks for itself already; there is no need to make the name -usage-alpha. WDYT?

[t-kikuc]

@khanhtc1202

That's because README.md already exists.
https://github.com/pipe-cd/pipecd/blob/master/cmd/pipedv1/README.md

• It (should) focus on how to run pipedv1 locally, not contain plugins config, etc.
• It is for developers, not for users. (I guess users won't see cmd/)

How about moving or renaming after finding a better place?
For now, I want to clarify what's needed for the alpha user guide.

[khanhtc1202]

@t-kikuc got that. Thank you!

[khanhtc1202]

🫡

[t-kikuc]

TODO: use binary instead of docker for now