Inherit theme (#3067)

* Add RawTheme to handle inheritance with theme palette

* Add a intermediate step in theme loading

it uses RawTheme struct to load the original ThemePalette, so we can merge it with the inherited one.

* Load default themes via RawThemes, remove Theme deserialization

* Allow naming custom theme same as inherited one

* Remove RawTheme and use toml::Value directly

* Resolve all review changes resulting in a cleaner code

* Simplify return for Loader::load

* Add  implementation to avoid extra step for loading of base themes

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index e5edcaac..6537543a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -523,6 +523,7 @@ dependencies = [
  "futures-util",
  "helix-core",
  "helix-dap",
+ "helix-loader",
  "helix-lsp",
  "helix-tui",
  "log",