[md] virtual file system: links to community, wording, formatting
[md] virtual file system: links to community, wording, formatting

develar/intellij-sdk-docs,artspb/intellij-sdk-docs,JetBrains/intellij-sdk-docs,chashnikov/intellij-sdk-docs,chashnikov/intellij-sdk-docs,breandan/intellij-sdk-docs,breandan/intellij-sdk-docs,JetBrains/intellij-sdk-docs,breandan/intellij-sdk-docs,JetBrains/intellij-sdk-docs,chashnikov/intellij-sdk-docs,artspb/intellij-sdk-docs,develar/intellij-sdk-docs,develar/intellij-sdk-docs,artspb/intellij-sdk-docs,artspb/intellij-sdk-docs,chashnikov/intellij-sdk-docs