This adds support for using templated/dynamic urls in routes.
* refactor interpolateString into utils and add interpolation support for app plugin routes.
* cleanup and add error check for url parse failure
* add docs for interpolated route urls
Closes#16835
A datasource plugin must return a list of tags in the 'tags' field of
the annotationQuery result. A string 'test' would otherwise result in
4 tags in Grafana: 't','e','s','t'.
* docs(plugins): new developing plugins section
Creates new section called Developing Plugins in
the plugin section of the docs.
1. Some changes to the Development guide page
2. Converted defaults/editor mode blog post
to new page
3. Converted snapshots blog post to new page
4. Adds new code styleguide page
5. Updates to apps and datasources pages
6. Adds plugin.json schema
* docs(links): fixes broken links
Fixes broken links to other pages as
well as broken image links.
