refactor(config): parse config values from raw bytes like Zig

Zig parses config values (cli/args.zig, Config.zig field parsers,
config/string.zig) from raw byte slices, and each field type decides
whether it requires UTF-8 (InvalidValue otherwise) or stores bytes. The
port escape-encoded raw bytes into Strings at the line reader and let
fields parse the escaped text, so fields could observe encoding
artifacts; successive audits kept finding such leaks (RV5-RV8).

Field parsers now receive the original bytes: text fields validate UTF-8
where Zig does, byte/path fields store bytes (EncodedOs/OsString). This
resolves all 9 RV8 findings (docs/rewrite/notes/review-rv8-codex.md),
each with a regression test: Windows path conversion fails with
BadPathName instead of substituting U+FFFD; Windows process launch uses
strict UTF-8 like Zig's Command; the WTF-8 decoder accepts paired-
surrogate encodings like Zig; literal U+FDD0 Unicode key triggers;
selection-word-chars and clipboard-codepoint-map reject invalid UTF-8;
font style / codepoint-map family names use original bytes; C title
actions forward bytes; D-Bus new-window/Flatpak conversions match Zig.
Design, sweep and validation: docs/rewrite/notes/final-bytes-refactor.md.

Also moves the bundled iTerm2-Color-Schemes license out of
resources/themes/ so +list-themes no longer lists it as a theme
(output is now byte-identical to Ghostty 1.3.1).

Done by Codex (gpt-6-astra), reviewed and verified by the orchestrator.

Test Plan:
- cargo test --workspace --no-fail-fast (3428 passed, exit 0)
- just check-macos (both), just check-windows, just check-wasm
- +show-config --default --docs, +list-keybinds, +list-actions --docs,
  +list-themes --plain compared with /usr/bin/ghostty

crates/ghostty-cli/src/list_fonts.rs

@@ -8,10 +8,10 @@ config_struct! {
     pub struct Options {
         /// The font family to search for. If this is set, then only fonts
         /// matching this family will be listed.
-        "family" => family: Option<String> = None,
+        "family" => family: Option<ghostty_os::osbytes::EncodedOs> = None,
 
         /// The style name to search for.
-        "style" => style: Option<String> = None,
+        "style" => style: Option<ghostty_os::osbytes::EncodedOs> = None,
 
         /// Font styles to search for. If this is set, then only fonts that
         /// match the given styles will be listed.
@@ -45,7 +45,7 @@ cli_options!(Options, help);
 ///   * `--family`: Filter results to a specific font family. The family handling
 ///     is identical to the `font-family` set of Ghostty configuration values, so
 ///     this can be used to debug why your desired font may not be loading.
-pub fn run(args: &[String]) -> Result<u8, Error> {
+pub fn run(args: &[impl AsRef<[u8]>]) -> Result<u8, Error> {
     let mut opts = Options::default();
     crate::parse_options(&mut opts, args)?;