[ENHANCEMENT] Support for `--tag-stat-link` and `tag-doc` defined in robot.toml in language-server

[d-biehl]

create the posibility to click on a link if tag-stat-link and if tag-doc is defined show this info in hover

see also https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_documentLink