languages: Add rumdl for markdown (#14721)

Author: funnes

book/src/generated/lang-support.md

@@ -164,7 +164,7 @@
 | mail | ✓ | ✓ |  |  |  |  |
 | make | ✓ |  | ✓ |  |  |  |
 | markdoc | ✓ |  |  |  |  | `markdoc-ls` |
-| markdown | ✓ |  |  | ✓ |  | `marksman`, `markdown-oxide` |
+| markdown | ✓ |  |  | ✓ |  | `marksman`, `markdown-oxide`, `rumdl` |
 | markdown-rustdoc | ✓ |  |  |  |  |  |
 | markdown.inline | ✓ |  |  |  |  |  |
 | matlab | ✓ | ✓ | ✓ |  |  |  |

languages.toml

@@ -115,6 +115,7 @@ rescript-language-server = { command = "rescript-language-server", args = ["--st
 robotframework_ls = { command = "robotframework_ls" }
 ruff = { command = "ruff", args = ["server"] }
 ruby-lsp = { command = "ruby-lsp" }
+rumdl = { command = "rumdl", args = ["server"] }
 serve-d = { command = "serve-d" }
 slangd = { command = "slangd" }
 slint-lsp = { command = "slint-lsp", args = [] }
@@ -1884,7 +1885,7 @@ scope = "source.md"
 injection-regex = "md|markdown"
 file-types = ["md", "livemd", "markdown", "mdx", "mkd", "mkdn", "mdwn", "mdown", "markdn", "mdtxt", "mdtext", "workbook", { glob = "PULLREQ_EDITMSG" }]
 roots = [".marksman.toml"]
-language-servers = [ "marksman", "markdown-oxide" ]
+language-servers = [ "marksman", "markdown-oxide", "rumdl" ]
 indent = { tab-width = 2, unit = "  " }
 block-comment-tokens = { start = "<!--", end = "-->" }
 word-completion.trigger-length = 4