<ddns-scripts> Cloudflare DDNS Updater script

On the following Description, new information needs to be added https://github.com/openwrt/packages/blob/fa69fdc2b081abb57fc05c8d16356b16bdfdec5c/net/ddns-scripts/Makefile#L88

If possible, adding it to the lUCI configuration editing dialog to avoid having to edit the /etc/config/ddns file directly.

• The API need to be generated on the Cloudflare Dashboard at https://dash.cloudflare.com/profile/api-tokens` and should be a Zone DNS with Edit Abilities
• Username needs to be Bearer
• Password needs to be the created above Token
• In /etc/config/ddns, two options need to be added and set to the Zone ID as shown on the Domain Page (right side)
  • option id
  • option zone-id
• Script doesn't account for proxy support, which is now supported by the API.

Example API from https://developers.cloudflare.com/api/operations/dns-records-for-a-zone-update-dns-record,

curl --request PUT \
  --url https://api.cloudflare.com/client/v4/zones/zone_id/dns_records/dns_record_id \
  --header 'Content-Type: application/json' \
  --header 'X-Auth-Email: ' \
  --data '{
  "content": "198.51.100.4",
  "name": "example.com",
  "proxied": false,
  "type": "A",
  "comment": "Domain verification record",
  "tags": [
    "owner:dns-team"
  ],
  "ttl": 3600
}'

Start by reading the ddns-scripts Makefile description and inspecting how /etc/config/ddns is exposed through the LuCI configuration editing dialog. Compare the current Cloudflare behavior with the linked API example; done means the required token and zone settings are documented and configurable, with proxy support accounted for.