doc(editors): how to use rome as a language server in helix

editors/helix/manual.md

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+# Configuration
+Currently, rome supports the following file extensions: `js`, `jsx`, `ts`, `tsx` and `d.ts`. 
+
+Rome uses a file socket to connect the editor client, which may be different from other language servers using a binary e.g. `rust-analyzer`.
+
+You can use `nc -U ${LANGUAGE_SERVER_SOCKET_PATH}` to connect to the Rome language server. `LANGUAGE_SERVER_SOCKET_PATH` is path to where the Rome's socket is created. Rome creates that socket inside the temporary folder of the operative system, inside a folder called `rome-socket`. 
+
+To know the path of your OS, run the command:
+```shell
+rome __print_socket
+```
+More details why we need `nc`, please read the [wiki page of helix](https://github.com/helix-editor/helix/wiki/How-to-install-the-default-language-servers)
+
+**languages.toml**
+```toml
+[[language]]
+name = "javascript"
+scope = "source.js"
+file-types = ["js"]
+language-server = { command = "nc", args = ["-U", "/tmp/rome-socket"] }
+formatter = { command = "rome", args = ["format", "--stdin-file-path", "test.js"]}
+auto-format = true
+
+[[language]]
+name = "jsx"
+scope = "source.jsx"
+file-types = ["jsx"]
+language-server = { command = "nc", args = ["-U", "/tmp/rome-socket"] }
+formatter = { command = "rome", args = ["format", "--stdin-file-path", "test.jsx"]}
+auto-format = true
+[[language]]
+name = "typescript"
+scope = "source.ts"
+file-types = ["ts"]
+language-server = { command = "nc", args = ["-U", "/tmp/rome-socket"] }
+formatter = { command = "rome", args = ["format", "--stdin-file-path", "test.ts"]}
+auto-format = true
+
+[[language]]
+name = "tsx"
+scope = "source.tsx"
+file-types = ["tsx"]
+language-server = { command = "nc", args = ["-U", "/tmp/rome-socket"] }
+formatter = { command = "rome", args = ["format", "--stdin-file-path", "test.tsx"]}
+auto-format = true
+
+```
+`/tmp/rome-socket` is the default socket file path in Linux. Use the command `rome __print_socket` and use the correct value.
+
+# Limitation
+1. The socket is not automatically created, and you need to call the command [`rome start`](https://rome.tools/#rome-start) in order to create one. Use the command [`rome stop`](https://rome.tools/#rome-stop) to free the socket.
+
+# Video record
+## Code Action
+https://user-images.githubusercontent.com/17974631/190205045-aeb86f87-1915-4d8b-8aad-2c046443ba83.mp4
+
+## Formatting
+https://user-images.githubusercontent.com/17974631/190205065-ddfde866-5f7c-4f53-8a62-b6cbb577982f.mp4