Make it even easier to define templates for tags, triggers, and variables (only based on JS)

[tsteur]

Currently a template is defined by having eg a Template/Tag/MatomoAnalytics.php and Template/Tag/MatomoAnalytics.web.js file. We could make this potentially easier although it also has some drawbacks.

We could make it as easy as in the simplest case let developers only define a file eg
Template/Tag/MatomoAnalytics.web.js where the ID would be extracted from the file name as MatomoAnalytics and the name be Matomo Analytics. It would be also possible to define a translation with the translation key PluginName_MatomoAnalytics. Because it ends with .web.js we would know it is for the web context and it would be placed in the Others category.

However, it is recommended to define a description, possibly help, parameters, ... and therefore we should require developers to also define like a JSON file Template/Tag/MatomoAnalytics.json. The format be like: {id: "MatomoAnalytics", name: "PluginName_MatomoAnalytics", description: "foo bar", help: "foo bar", context: ["web"], order: 999, category: "Page View", logo: "...", parameters: [{key: "idSite", "name": "Site ID", type: "string", uiControl: "text", validators: ["NotEmpty", "UrlLike"]....}]}

However there are obviously a few downsides. For example there is no auto completion (in PHP there are constants), there is a lot more documentation needed and in JSON it is much easier to introduce typos etc because of this. Also we would likely need to document both ways the PHP and JSON way and having two ways to do the same thing is not always ideal. As there might be cases where you still need PHP, it would be the preferred way to use PHP from the beginning.