docs: Outline Jsonnet language (#19410)

This PR adds a basic documentation about the Jsonnet language support.

Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

docs/src/languages.md

@@ -32,6 +32,7 @@ Zed supports hundreds of programming languages and text formats. Some work out-o
 - [JavaScript](./languages/javascript.md)
 - [Julia](./languages/julia.md)
 - [JSON](./languages/json.md)
+- [Jsonnet](./languages/jsonnet.md)
 - [Kotlin](./languages/kotlin.md)
 - [Lua](./languages/lua.md)
 - [Luau](./languages/luau.md)
@@ -104,7 +105,6 @@ Zed supports hundreds of programming languages and text formats. Some work out-o
 - [Groq](https://github.com/juice49/zed-groq)
 - [INI](https://github.com/bajrangCoder/zed-ini)
 - [Java](https://github.com/zed-extensions/java)
-- [Jsonnet](https://github.com/narqo/zed-jsonnet)
 - [Justfiles](https://github.com/jackTabsCode/zed-just)
 - [LaTeX](https://github.com/rzukic/zed-latex)
 - [Ledger](https://github.com/mrkstwrt/zed-ledger)

docs/src/languages/jsonnet.md

@@ -0,0 +1,24 @@
+# Jsonnet
+
+Jsonnet language support in Zed is provided by the community-maintained [Jsonnet extension](https://github.com/narqo/zed-jsonnet).
+
+- Tree Sitter: [sourcegraph/tree-sitter-jsonnet](https://github.com/sourcegraph/tree-sitter-jsonnet)
+- Language Server: [grafana/jsonnet-language-server](https://github.com/grafana/jsonnet-language-server)
+
+## Configuration
+
+Workspace configuration options can be passed to the language server via the `lsp` settings of the `settings.json`.
+
+The following example enables support for resolving [tanka](https://tanka.dev) import paths in `jsonnet-language-server`:
+
+```json
+{
+  "lsp": {
+    "jsonnet-language-server": {
+      "settings": {
+        "resolve_paths_with_tanka": true
+      }
+    }
+  }
+}
+```