Minor - removed unused pytest marker, explanation on using solargraph in readme

Also removed solargraph installation from CI

.github/workflows/pytest.yml

@@ -123,9 +123,7 @@ jobs:
           ruby-version: '3.4'
       - name: Install Ruby language server
         shell: bash
-        run: |
-          gem install solargraph
-          gem install ruby-lsp
+        run: gem install ruby-lsp
       - name: Install Zig
         uses: goto-bus-stop/setup-zig@v2
         with:

README.md

@@ -105,7 +105,7 @@ With Serena, we provide direct, out-of-the-box support for:
   * C/C++ (you may experience issues with finding references, we are working on it)
   * Zig (requires installation of ZLS - Zig Language Server)
   * C#
-  * Ruby
+  * Ruby (by default, uses [ruby-lsp](https://github.com/Shopify/ruby-lsp), specify ruby_solargraph as your language to use the previous solargraph based implementation)
   * Swift
   * Kotlin (uses the pre-alpha [official kotlin LS](https://github.com/Kotlin/kotlin-lsp), some issues may appear)
   * Java (_Note_: startup is slow, initial startup especially so. There may be issues with java on macos and linux, we are working on it.)

pyproject.toml

@@ -265,7 +265,6 @@ markers = [
   "bash: language server running for Bash",
   "snapshot: snapshot tests for symbolic editing operations",
   "ruby: language server running for Ruby (uses ruby-lsp)",
-  "ruby_solargraph: ruby-solargraph language server for Ruby",
   "zig: language server running for Zig",
   "lua: language server running for Lua",
   "nix: language server running for Nix",