Add vega lite spec validation for charts (#4336)

* Add vega lite spec validation for charts

* Fix lint

* Update tests

* Embedd vega lite spec file

* Fix lint

go.mod

@@ -68,6 +68,7 @@ require (
 	github.com/redis/go-redis/v9 v9.0.2
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/rs/cors v1.9.0
+	github.com/santhosh-tekuri/jsonschema/v5 v5.2.0
 	github.com/sashabaranov/go-openai v1.19.3
 	github.com/snowflakedb/gosnowflake v1.7.2
 	github.com/spf13/cobra v1.8.0

go.sum

@@ -1954,6 +1954,7 @@ github.com/ruudk/golang-pdf417 v0.0.0-20201230142125-a7e3863a1245/go.mod h1:pQAZ
 github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
 github.com/safchain/ethtool v0.0.0-20190326074333-42ed695e3de8/go.mod h1:Z0q5wiBQGYcxhMZ6gUqHn6pYNLypFAvaL3UvgZLR0U4=
 github.com/safchain/ethtool v0.0.0-20210803160452-9aa261dae9b1/go.mod h1:Z0q5wiBQGYcxhMZ6gUqHn6pYNLypFAvaL3UvgZLR0U4=
+github.com/santhosh-tekuri/jsonschema/v5 v5.2.0 h1:WCcC4vZDS1tYNxjWlwRJZQy28r8CMoggKnxNzxsVDMQ=
 github.com/santhosh-tekuri/jsonschema/v5 v5.2.0/go.mod h1:FKdcjfQW6rpZSnxxUvEA5H/cDPdvJ/SZJQLWWXWGrZ0=
 github.com/sashabaranov/go-openai v1.19.3 h1:xJvkU8Tye6MOKLaoqjh7qXYwKiEYGtlmp06cb8179yo=
 github.com/sashabaranov/go-openai v1.19.3/go.mod h1:lj5b/K+zjTSFxVLijLSTDZuP7adOgerWeFyZLUhAKRg=