add custom text format with jinja templating

[dmachard]

fix #587

New text format with jinja template

global:
  text-jinja: |+
    ;; Got {% if dm.DNS.Type == "QUERY" %}query{% else %}answer{% endif %} from {{ dm.NetworkInfo.QueryIP }}#{{ dm.NetworkInfo.QueryPort }}:
    ;; ->>HEADER<<- opcode: {{ dm.DNS.Opcode }}, status: {{ dm.DNS.Rcode }}, id: {{ dm.DNS.ID }}
    ;; flags: {{ dm.DNS.Flags.QR | yesno:"qr ," }}{{ dm.DNS.Flags.RD | yesno:"rd ," }}{{ dm.DNS.Flags.RA | yesno:"ra ," }}; QUERY: {{ dm.DNS.QuestionsCount }}, ANSWER: {{ dm.DNS.DNSRRs.Answers | length }}, AUTHORITY: {{ dm.DNS.DNSRRs.Nameservers | length }}, ADDITIONAL: {{ dm.DNS.DNSRRs.Records | length }}

    ;; QUESTION SECTION:
    ;{{ dm.DNS.Qname }}     {{ dm.DNS.Qclass }} {{ dm.DNS.Qtype }}

    ;; ANSWER SECTION: {% for rr in dm.DNS.DNSRRs.Answers %}
    {{ rr.Name }}       {{ rr.TTL }} {{ rr.Class }} {{ rr.Rdatatype }} {{ rr.Rdata }}{% endfor %}

    ;; WHEN: {{ dm.DNSTap.Timestamp }}
    ;; MSG SIZE  rcvd: {{ dm.DNS.Length }}

Output example

;; Got query from 172.19.0.1#58505:
;; ->>HEADER<<- opcode: 0, status: NOERROR, id: 51670
;; flags: rd ; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.apple.com          IN      A

;; ANSWER SECTION: 

;; WHEN: 1718995587930350802
;; MSG SIZE  rcvd: 54

;; Got answer from 172.19.0.1#58505:
;; ->>HEADER<<- opcode: 0, status: NOERROR, id: 51670
;; flags: qr rd ra ; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.apple.com          IN      A

;; ANSWER SECTION: 
www.apple.com           881 IN CNAME www.apple.com.edgekey.net
www.apple.com.edgekey.net               2681 IN CNAME www.apple.com.edgekey.net.globalredir.akadns.net
www.apple.com.edgekey.net.globalredir.akadns.net                3599 IN CNAME e6858.dscx.akamaiedge.net
e6858.dscx.akamaiedge.net               19 IN A 2.21.145.39

;; WHEN: 1718995587946111311
;; MSG SIZE  rcvd: 192