feat(lsp): language servers inside plugin-injected ranges (#2235)

* feat(lsp): language servers inside plugin-injected ranges

* chore(plugins): rebuild bundled plugins for the updated injections docs

wit/injections.wit

@@ -1,6 +1,10 @@
 package openidea:[email protected];
 
-/// Embedded languages. This host routes plugin providers, not embedded LSP servers.
+/// Embedded languages. The host routes plugin providers and configured language
+/// servers inside these ranges, preserving host-document UTF-16 coordinates.
+/// Each LSP range gets its own masked, in-memory sibling document (at most 32
+/// per host document, documents over 2 MiB excluded). No file is written.
+/// Formatting and rename continue to use the host language's server.
 interface injections {
     /// A versioned document snapshot. Coordinates are zero-based UTF-16.
     record document { path: string, language: string, version: u64, text: string }