Add DumpVar helper function to help debugging templates (#24262)
I guess many contributors might agree that it's really difficult to
write Golang template. The dot syntax `.` confuses everyone: what
variable it is ....
So, we can use a `{{DumpVar .ContextUser}}` to look into every variable
now.
And it can even dump the whole `ctx.Data` by `{{DumpVar .}}`:
```
dumpVar: templates.Vars
{
"AllLangs": [
{
"Lang": "id-ID",
"Name": "Bahasa Indonesia"
},
...
"Context": "[dumped]",
"ContextUser": {
"AllowCreateOrganization": true,
"AllowGitHook": false,
"AllowImportLocal": false,
...
"TemplateLoadTimes": "[func() string]",
"TemplateName": "user/profile",
"Title": "Full'\u003cspan\u003e Name",
"Total": 7,
"UnitActionsGlobalDisabled": false,
"UnitIssuesGlobalDisabled": false,
"UnitProjectsGlobalDisabled": false,
"UnitPullsGlobalDisabled": false,
"UnitWikiGlobalDisabled": false,
"locale": {
"Lang": "en-US",
"LangName": "English",
"Locale": {}
}
...
---------
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: silverwind <me@silverwind.io>
c0d105609f
