Add Settings with fullscreen and windowed options, a config file

(settings.toml) to persist settings, fix a bug in platform code where
innner window size wasn't updated on resize, various other tweaks

Cargo.lock

@@ -2192,6 +2192,8 @@ dependencies = [
  "glam 0.30.9",
  "raidillon_assets",
  "raidillon_core",
+ "serde",
+ "toml",
  "winit",
 ]
 
@@ -2413,6 +2415,15 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "serde_spanned"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e24345aa0fe688594e73770a5f6d1b216508b4f93484c0026d521acd30134392"
+dependencies = [
+ "serde_core",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -2669,6 +2680,21 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "toml"
+version = "0.9.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0dc8b1fb61449e27716ec0e1bdf0f6b8f3e8f6b05391e8497b8b6d7804ea6d8"
+dependencies = [
+ "indexmap",
+ "serde_core",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_parser",
+ "toml_writer",
+ "winnow",
+]
+
 [[package]]
 name = "toml_datetime"
 version = "0.7.3"
@@ -2699,6 +2725,12 @@ dependencies = [
  "winnow",
 ]
 
+[[package]]
+name = "toml_writer"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df8b2b54733674ad286d16267dcfc7a71ed5c776e4ac7aa3c3e2561f7c637bf2"
+
 [[package]]
 name = "tracing"
 version = "0.1.41"