feat(certificates): add self-signed CA and corresponding certificate

Adds a self-signed CA configuration and a certificate for the 
shiny organization. This change creates a Kubernetes Secret for 
the CA key pair and an Issuer that references this Secret. A 
Certificate resource is created to automate certificate 
provisioning for specified DNS names, improving the 
infrastructure's security and facilitating testing.

certs/local-ca.pem

@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----
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+mW5CaMrDgyLhGx1XRoVY9KfWjzJzjR/A1MPevpVbA1Oom0DkV3OCeaBcncr5faA=
+-----END CERTIFICATE-----