refactor: resolve cross-crate integration TODOs and resources discovery

Cleanup pass over items collected in docs/rewrite/INTEGRATION_TODO.md:
- OSC 133 printf-q / percent decoders live once in
  ghostty_vt::string_encoding; ghostty-os re-exports them.
- CursorStyle and clipboard codepoint map entries have one definition
  (ghostty-terminal); ghostty-config now depends on ghostty-terminal.
- ActionKey::docs() trailing blank lines fixed at the source; cli's
  workaround removed (+list-actions --docs still byte-identical).
- x11_color exposes names in original case; cli no longer re-parses
  rgb.txt.
- One cgroup scope wait loop (ghostty_os::cgroup::wait_for_scope).
- Flatpak passwd lookup implemented in ghostty-os via a local pty.
- +version shows the rustc version captured at build time.

Resources: dev builds find <workspace>/resources automatically (keeping
Ghostty's sentinel-file detection and GHOSTTY_RESOURCES_DIR);
scripts/gen-terminfo.sh (just terminfo) regenerates the compiled
terminfo; `just install [PREFIX]` installs binary, share/ghostty,
terminfo, desktop/D-Bus/systemd/metainfo files and icons.

Test Plan:
- cargo test for vt, os, config, input, cli
- diff `+list-keybinds`, `+list-actions --docs`, `+show-config --default`
  against /usr/bin/ghostty

crates/ghostty-config/src/clipboard_codepoint_map.rs

@@ -2,27 +2,10 @@
 //! for clipboard operations. When copying text to clipboard, matching
 //! codepoints will be replaced with their mapped values.
 
-/// Replacement value for a codepoint range.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum Replacement {
-    /// A single replacement codepoint.
-    Codepoint(u32),
-    /// A UTF-8 encoded string to replace with.
-    String(String),
-}
-
-/// One entry of the map.
-///
-/// TODO(integration): this mirrors `terminal/formatter.zig` `CodepointMap`;
-/// replace with `ghostty_terminal::formatter::CodepointMap` once available.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct Entry {
-    /// Unicode codepoint range to replace.
-    /// Asserts: range[0] <= range[1]
-    pub range: [u32; 2],
-    /// Replacement value for this range.
-    pub replacement: Replacement,
-}
+/// One entry of the map and its replacement value. The canonical
+/// definitions live in `ghostty_terminal::formatter` (`CodepointMap`,
+/// `Replacement`), which is what the terminal formatter consumes.
+pub use ghostty_terminal::formatter::{CodepointMap as Entry, Replacement};
 
 /// The list of entries.
 ///