Add kseal to README

[eznix86]

Description of the change

Adds kseal in the README, a companion CLI that simplifies working with Bitnami Sealed Secrets. This wraps underlying kubeseal operations to make day-to-day tasks more ergonomic.

Benefits

• Provides an alternative for viewing, exporting, encrypting Secrets and decrypting SealedSecrets
• Support multiple manifests in a single file.

Example

# app.yaml
kind: ConfigMap
---
kind: Secret <--- will only encrypt this part and keep the order if `--in-place` is specified. Same for decrypting with SealedSecrets.
---
kind: Deployment

Possible drawbacks

Applicable issues

Additional information

Example usage from kseal:

### Common Usage

# Generate a config file 
kseal init 
# .kseal-config.yaml
# version: 0.33.1 <---- which version of kubeseal to use for this project by default picks the last one.
# controller_name: sealed-secrets
# controller_namespace: sealed-secrets
# unsealed_dir: .unsealed <--- useful for export.


# View a decrypted secret from a SealedSecret manifest (requires cluster access)
kseal cat sealed.yaml

# Export decrypted secrets
kseal export sealed.yaml

# use files yaml to grab the manifests
kseal export --all

# use ownerReferences to get the secrets.
kseal export --all --from-cluster

# Encrypt a plaintext Secret (use kubeseal behind the scene)
kseal encrypt secret.yaml -o sealed.yaml
kseal encrypt secret.yaml --in-place

### Offline Decryption

# One-time: export private keys while cluster access is available
kseal export-keys

# Decrypt without cluster access (use kubeseal behind the scene)
kseal decrypt sealed.yaml
kseal decrypt-all --in-place

### Version Management

kseal version update # latest
kseal version set 0.33.1 # set global unless specified in the config
kseal version list # view all version of kubeseal installed

[alvneiayu]

hi @eznix86

First, thank you so much for sending us a PR sharing your project. Looks so interesting.

The procedure to include projects like this, is to include the URL to the project in our section of related project:

https://github.com/bitnami-labs/sealed-secrets/blob/main/README.md#related-projects

We are not including documentation of specific projects, just documentation related to Sealed Secrets by itself.

Could you send us a new PR including your project in this related section, please?

I will be pleased to include it and review it.

Álvaro

[eznix86]

hi @alvneiayu it is already included in the PR. The documentation i provided in the comments is because the PR template asked so thank you!

[eznix86]

Thank you !