feat: add support for custom CA cert

[dion-gionet]

Closes #14

Also added feat: add support for other credential entry types

[Copilot]

Pull Request Overview

This PR adds support for custom CA certificates to enable the operator to connect to DVLS servers with self-signed certificates. Additionally, it extends credential type support beyond username/password to include access codes, API keys, Azure service principals, connection strings, and private keys.

Key changes:

• Added CA certificate mounting capability in Helm chart and deployment configuration
• Removed credential type restrictions and implemented support for multiple credential entry types
• Updated documentation with CA certificate configuration examples

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
hack/add-ca-cert-to-helm.sh	Bash script to inject CA cert volume mounts into Helm deployment template
controllers/dvlssecret_controller.go	Removed credential type restrictions and refactored secret mapping to support multiple credential types
config/manager/kustomization.yaml	Version bump to 0.3.0
chart/values.yaml	Version bump to 0.3.0
chart/templates/deployment.yaml	Added conditional SSL_CERT_FILE environment variable and volume mounts for CA certificate
chart/templates/ca-cert-secret.yaml	New template for creating CA certificate secret
chart/Chart.yaml	Version bump to 0.3.0
README.md	Expanded documentation with CA certificate configuration guide and updated credential type descriptions
Makefile	Version bump to 0.3.0 and added CA cert injection script to helm build process

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