Release 7 1 0

[aeciopires]

What this PR does / why we need it:

• Bump version
• Adjust in docs to support new versions about requirements to maintaining this repository
• Added more information about the structure of this repository and workflow to publish new releases
• Added SKILL.md about release-chart and CLAUDE.md files
• Added new values in docs/example/kind/values.yaml to support 7.4.11 release and PostgreSQL 18.x and TimeScaleDB 2.28.x
• Added new values in values.yaml to support 7.0.23 release

Fixed issues:

• Bump actions/checkout from 4 to 6 #212 (dependabot)
• Add update strategy for zabbixAgent #213 (thanks @scoopex)
• Add hostPid and hostIPC mode for zabbixAgent #214 (thanks @scoopex)
• Add support for dynamic agent hostname using ZBX_HOSTNAMEITEM #221 (thanks @manuelmayer-dev)

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• DCO signed
• Variables are documented in values.yaml with Helm-Docs comments, as we build README.md using this utility

New helm values:

zabbixImageTag: "ubuntu-7.0.23"

zabbixAgent:
  # -- allows the pod to share the host's IPC namespace in DaemonSet mode (e.g., shared memory)
  daemonSetHostIPC: false 
  # -- allows the pod to see the processes on the host system in DaemonSet mode
  daemonSetHostPID: false 
  # -- Configures the update strategy for the zabbixAgent DaemonSet
  daemonSetUpdateStrategy: null
  # -- Type of update strategy for the zabbixAgent DaemonSet
  type: RollingUpdate
  # -- Rolling update configuration for the zabbixAgent DaemonSet
  rollingUpdate:
    # -- Maximum number of unavailable pods during the update
    maxUnavailable: 5
  # -- you can also use a percentage
  # maxUnavailable: 10%
  # -- If set, this item will be used to dynamically determine the agent hostname instead of using the Kubernetes node name. Example: "system.hostname"
   ZBX_HOSTNAMEITEM: "system.hostname"