Automatically fetch plugin description from README.md

[zhutmost]

In the JetBrains graddle plugin template, the in plugin.xml is generated by the build flow. It will locate the flag in the README.md, and automatically insert the description into the final plugin.xml.
The related code in build.graddle.kts is: (Link)

        // Extract the <!-- Plugin description --> section from README.md and provide for the plugin's manifest
        pluginDescription = providers.fileContents(layout.projectDirectory.file("README.md")).asText.map {
            val start = "<!-- Plugin description -->"
            val end = "<!-- Plugin description end -->"

            with (it.lines()) {
                if (!containsAll(listOf(start, end))) {
                    throw GradleException("Plugin description section not found in README.md:\n$start ... $end")
                }
                subList(indexOf(start) + 1, indexOf(end)).joinToString("\n").let(::markdownToHTML)
            }
        }

Please add this feature into this sbt build flow. It is very useful.

[unkarjedy]

It looks like a nice feature, but unfortunately we won't have resources to address it in the nearest future.
A PR would be very welcome.