Merge for #181

[rgeyer]

This is a superset of #181 which includes recent changes/updates to main.

It also updates the docs (as soon as I finish that, I realized it was needed while writing this PR).

[rgeyer]

@alex5517, if you have a second to look this over. I'll get it merged ASAP. :)

[v-zhuravlev]

LGTM

[alex5517]

I made some changes to the original PR #181 which might be good to have included here (Had not seen this PR).

It does look like an issue was introduced with PR: #205 I did not fully investigate the root cause of this issue... but the dashboard-linter is no longer able to parse some dashboards:

Error: failed to parse dashboard: json: cannot unmarshal number into Go struct field FieldConfig.rows.panels.fieldConfig.defaults.noValue of type string
failed to parse dashboard: json: cannot unmarshal number into Go struct field FieldConfig.rows.panels.fieldConfig.defaults.noValue of type string
exit status 1

I noticed this new error when linting one of the dashboards provided by mimir-mixin https://github.com/grafana/mimir/blob/main/operations/mimir-mixin-compiled/dashboards/mimir-compactor.json

Also wanna mention that there is an issue present both in this and the other PR with autofix
https://github.com/grafana/dashboard-linter/blob/main/lint/rules.go#L158-L166
If dashboard still uses the deprecated rows instead of panels then when fixing target it takes target from rows and tries to apply to panel which results in panic...

panic: runtime error: index out of range [0] with length 0

I was planning to have a look at it, just haven't got around to it...

[v-zhuravlev]

@alex5517 , I think using https://github.com/grafana/grafana-foundation-sdk/ in #205 caused some old Dashboards not to parse. Would try to address it.

[v-zhuravlev]

#219