feat: s3 plugin, and vfs

[starpit]

This covers most of the examples in the issue. It doesn't cover every possible use case, yet.

Providers supported:

1. local minio
2. ibm cloud object storage

TODO: AWS and Azure storage?
TODO: other use cases, e.g. cat file > /s3/bucket1/foo

Fixes #5319

Description of what you did:

My PR is a:

• 💥 Breaking change
• 🐛 Bug fix
• 💅 Enhancement
• 🚀 New feature

Please confirm that your PR fulfills these requirements

• Multiple commits are squashed into one commit.
• The commit message follows Conventional Commits, which allows us to autogenerate release notes; e.g. fix(plugins/plugin-k8s): fixed annoying bugs
• All npm dependencies are pinned.

[codecov]

Codecov Report

Merging #5320 into master will decrease coverage by 0.72%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master    #5320      +/-   ##
==========================================
- Coverage   59.74%   59.02%   -0.73%     
==========================================
  Files          78       78              
  Lines        2539     2543       +4     
  Branches      627      628       +1     
==========================================
- Hits         1517     1501      -16     
- Misses        788      797       +9     
- Partials      234      245      +11     

Impacted Files	Coverage Δ
packages/core/src/webapp/tab.ts	73.91% <50.00%> (-6.09%)	⬇️
packages/core/src/repl/exec.ts	75.80% <100.00%> (+0.67%)	⬆️
packages/core/src/core/command-tree.ts	61.60% <0.00%> (-4.47%)	⬇️
packages/core/src/core/usage-error.ts	46.13% <0.00%> (-2.49%)	⬇️

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[starpit]

for future reference: the s3 impl uses the s3 API, so there is nothing minio or ibmcloud specific about the vfs layer. however, the credentials providers will need to be implemented for other cloud providers. see plugin-s3/src/providers