docs: add GDScript to README language list and CHANGELOG

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -4,6 +4,7 @@ Status of the `main` branch. Changes prior to the next official version change w
 
 * Language Servers:
   - No longer store temporary files (e.g. downloads) in `~/solidlsp_tmp`; instead, use OS-specific temporary directories
+  - Add **GDScript** (Godot Engine) support. Serena connects over TCP to the Godot editor's built-in LSP server (port 6008, same for Godot 3 and 4) — no separate language server process to install. Godot major version is auto-detected from `config_version` in `project.godot`. Note: Godot's LSP does not implement `workspace/symbol`; first workspace-wide scans fall back to per-file requests and can be slow for large projects (results are cached to disk). See the [GDScript Setup Guide](https://oraios.github.io/serena/03-special-guides/godot_gdscript_setup_guide_for_serena.html) for details. Closes #1446.
 
 * Dashboard:
   - UI polish: switch UI font to Inter (with system fallbacks) and use JetBrains Mono only for code/logs/paths/identifiers; refine the light/dark palette with softer borders, clearer text hierarchy, and a more nuanced shadow/elevation system; introduce a consistent spacing scale; keep the orange accent.

README.md

@@ -110,7 +110,7 @@ Serena incorporates a powerful abstraction layer for the integration of language
 The underlying language servers are typically open-source projects or at least freely available for use.
 
 When using Serena's language server backend, we provide **support for over 40 programming languages**, including
-Ada / SPARK, AL, Angular, Ansible, Bash, BSL, C#, C/C++, Clojure, Crystal, Dart, Elixir, Elm, Erlang, Fortran, F#, GLSL, Go, Groovy, Haskell, Haxe, HLSL, HTML, Java, JavaScript, JSON, Julia, Kotlin, Lean 4, Lua, Luau, Markdown, MATLAB, mSL, Nix, OCaml, Perl, PHP, PowerShell, Python, R, Ruby, Rust, Scala, SCSS / Sass / CSS, Solidity, Swift, TOML, TypeScript, WGSL, YAML, and Zig.
+Ada / SPARK, AL, Angular, Ansible, Bash, BSL, C#, C/C++, Clojure, Crystal, Dart, Elixir, Elm, Erlang, Fortran, F#, GDScript, GLSL, Go, Groovy, Haskell, Haxe, HLSL, HTML, Java, JavaScript, JSON, Julia, Kotlin, Lean 4, Lua, Luau, Markdown, MATLAB, mSL, Nix, OCaml, Perl, PHP, PowerShell, Python, R, Ruby, Rust, Scala, SCSS / Sass / CSS, Solidity, Swift, TOML, TypeScript, WGSL, YAML, and Zig.
 
 ### The Serena JetBrains Plugin