Feature Request: Add yaml.decode / yaml.encode to Lua helper functions

[kahirokunn]

Summary

Please add native YAML support to Sveltos Lua: yaml.decode(string) and yaml.encode(table).

Motivation

We want to use a kubeconfig stored in a Kubernetes Secret as the source and parse it directly in Lua without converting to JSON first. Native YAML I/O would simplify scripts, improve readability, and remove external conversion steps.

Example

-- Extract current cluster server URL and CA data from a kubeconfig YAML.
local function extract_kubeconfig_info(kubeconfig_yaml)
  local cfg = yaml.decode(kubeconfig_yaml)
  local current = cfg["current-context"]

  local function get_cluster_by_name(name)
    for _, c in ipairs(cfg.clusters or {}) do
      if c.name == name then return c.cluster end
    end
  end

  for _, ctx in ipairs(cfg.contexts or {}) do
    if ctx.name == current and ctx.context and ctx.context.cluster then
      local cl = get_cluster_by_name(ctx.context.cluster)
      if cl then
        return {
          server = cl.server,
          ca_data = cl["certificate-authority-data"],
        }
      end
    end
  end

  -- Not found
  return { server = nil, ca_data = nil }
end

-- usage:
-- local info = extract_kubeconfig_info(kubeconfig_yaml)
-- return info

Expected Behavior

• yaml.decode/encode available in the Lua runtime
• Handles single and multi‑document YAML