[DOC] Address feedback on DQL documentation

[vagimeli]

What do you want to do?

x Request a change to existing documentation

Tell us about your request. Provide a summary of the request and all versions that are affected.

• Address user feedback, in particular the following:

1. Examples involving special characters
2. Show the data record being queryed in the examples

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.

[hdhalter]

Another feedback comment on 5/2/23:

• queries like text:sales-channel not working, not returning result, escaping - with / not working

[hdhalter]

• Feedback comment on 5/22/23:
  /docs/latest/dashboards/discover/dql/ | DQL: how to handle multi-word search within a field? Ex. field:"find phrase" gives error. If no quotes, only matches the last word.

[hdhalter]

• Feedback comment on 2023-06-06: wildcards, contains examples missing

[hdhalter]

• Feedback on 20230422: /docs/latest/dashboards/discover/dql/ | I was looking for at more advanced query, but there is no reference to that page

[hdhalter]

• 20230828 | /docs/latest/dashboards/discover/dql/ | AND isn't same and
• 20230929 | /docs/1.3/dashboards/discover/dql/ Where is not example????
• 20230929 | /docs/2.6/dashboards/discover/dql/ | How to query "Not Equal To" ?????????
• 20231003 | /docs/2.5/dashboards/discover/dql/ | add NOT to the query
• 20231013 | /docs/2.9/dashboards/discover/dql/ | How do I deal with fields that have spaces in them?
• 20231027 | /docs/latest/dashboards/dql/ | Can't we use "not" in searches? How?
• 20231108 | /docs/2.7/dashboards/discover/dql/ | No example of wild card where we want to match pattern
• 20231109 | /docs/2.9/dashboards/discover/dql/ | needs example of using NOT in boolean query