Close #952: Add out-of-box support for Perl LSP server

* eglot.el (eglot-server-programs): Support Perl lsp.
* README.md: Update.
* NEWS.md: Update.

Co-authored-by: João Távora <[email protected]>

NEWS.md

@@ -52,8 +52,9 @@ available.  The special support code for RLS has been removed.
 ##### New servers have been added to `eglot-server-programs`
 - clojure-lsp ([#813][github#813])
 - racket-langserver ([#694][github#694])
-- futhark lsp ([#922](github#922))
-- purescript-language-server ([#905](github#905))
+- futhark lsp ([#922][github#922])
+- purescript-language-server ([#905][github#905])
+- Perl::LanguageServer ([#952][github#952])
 
 # 1.8 (12/1/2022)
 
@@ -386,4 +387,5 @@ and now said bunch of references-->
 [github#901]: https://github.com/joaotavora/eglot/issues/901
 [github#905]: https://github.com/joaotavora/eglot/issues/905
 [github#922]: https://github.com/joaotavora/eglot/issues/922
-[github#967]: https://github.com/joaotavora/eglot/issues/967
+[github#952]: https://github.com/joaotavora/eglot/issues/952
+[github#967]: https://github.com/joaotavora/eglot/issues/967

README.md

@@ -67,6 +67,7 @@ find-library` can help you tell if that happened.
 * Mint's [mint-ls][mint-ls]
 * Nix's [rnix-lsp][rnix-lsp]
 * Ocaml's [ocaml-lsp][ocaml-lsp]
+* Perl's [Perl::LanguageServer][perl-language-server]
 * PHP's [php-language-server][php-language-server]
 * PureScript's [purescript-language-server][purescript-language-server]
 * Python's [pylsp][pylsp], [pyls][pyls] or [pyright][pyright]
@@ -584,6 +585,7 @@ for the request form, and we'll send it to you.
 [mint-ls]: https://www.mint-lang.com/
 [rnix-lsp]: https://github.com/nix-community/rnix-lsp
 [ocaml-lsp]: https://github.com/ocaml/ocaml-lsp/
+[perl-language-server]: https://github.com/richterger/Perl-LanguageServer
 [php-language-server]: https://github.com/felixfbecker/php-language-server
 [purescript-language-server]: https://github.com/nwolverson/purescript-language-server
 [pyls]: https://github.com/palantir/python-language-server

eglot.el

@@ -196,7 +196,8 @@ language-server/bin/php-language-server.php"))
                                 (dockerfile-mode . ("docker-langserver" "--stdio"))
                                 (clojure-mode . ("clojure-lsp"))
                                 (csharp-mode . ("omnisharp" "-lsp"))
-                                (purescript-mode . ("purescript-language-server" "--stdio")))
+                                (purescript-mode . ("purescript-language-server" "--stdio"))
+                                (perl-mode . ("perl" "-MPerl::LanguageServer" "-e" "Perl::LanguageServer::run")))
   "How the command `eglot' guesses the server to start.
 An association list of (MAJOR-MODE . CONTACT) pairs.  MAJOR-MODE
 identifies the buffers that are to be managed by a specific