Add a simple, XCompose based input method

[mahkoh]

Since GTK no longer uses XCompose, this restores the previous functionality.

In addition to XCompose, users can also input unicode by invoking the enable-unicode-input action.

[Copilot]

Pull Request Overview

Adds a simple, XCompose-based input method (Simple IM) with optional Unicode input, integrates it into the text input pipeline, and exposes configuration and control via protocol, config, IPC, and CLI.

• Introduces Simple IM implementation and an abstraction layer (InputMethod, InputMethodKeyboardGrab) to support both external IM and Simple IM.
• Adds configuration support ([simple-im] table with enabled boolean), actions (enable/disable/toggle/reload, enable-unicode-input), and bumps jay_compositor protocol to v22 with new requests.
• Updates CLI and IPC to control Simple IM and adjusts event handling/render paths for new IM abstraction.

Reviewed Changes

Copilot reviewed 29 out of 29 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
wire/jay_input.txt	Adds set_simple_im_enabled and reload_simple_im requests (since v22) to control Simple IM.
toml-spec/spec/spec.yaml	Documents new actions and the [simple-im] configuration table.
toml-spec/spec/spec.generated.md	Generated docs reflecting new actions and [simple-im] config.
toml-spec/spec/spec.generated.json	Schema updated with SimpleIm type and new SimpleActionName values.
toml-config/src/lib.rs	Wires new SimpleCommand variants to seat methods; applies [simple-im].enabled at load.
toml-config/src/config/parsers/simple_im.rs	Adds parser for the [simple-im] table.
toml-config/src/config/parsers/config.rs	Hooks [simple-im] into top-level Config parsing.
toml-config/src/config/parsers/action.rs	Supports new simple-IM-related actions.
toml-config/src/config/parsers.rs	Registers simple_im parser module.
toml-config/src/config.rs	Adds SimpleIm struct and SimpleCommand variants; Config gains simple_im field.
src/tools/tool_client.rs	Negotiates JayCompositor version up to 22.
src/ifs/wl_surface.rs	Iterates IM popups via new trait API.
src/ifs/wl_seat/text_input/zwp_text_input_v3.rs	Switches to trait-based InputMethod interface.
src/ifs/wl_seat/text_input/zwp_input_method_v2.rs	Implements InputMethod for external IM; updates cleanup logic.
src/ifs/wl_seat/text_input/zwp_input_method_manager_v2.rs	Uses seat APIs to set IM respecting Simple IM precedence.
src/ifs/wl_seat/text_input/zwp_input_method_keyboard_grab_v2.rs	Adapts keyboard grab to new trait; controls event forwarding.
src/ifs/wl_seat/text_input/simple_im.rs	Implements Simple IM with XCompose and Unicode input handling.
src/ifs/wl_seat/text_input.rs	Introduces InputMethod traits and Simple IM lifecycle; connection logic.
src/ifs/wl_seat/event_handling.rs	Routes key/modifier events through IM grab and conditionally forwards to node.
src/ifs/wl_seat.rs	Stores dyn InputMethod, initializes Simple IM by default; toggling/reload logic.
src/ifs/jay_input.rs	Handles new Simple IM control requests.
src/ifs/jay_compositor.rs	Bumps compositor protocol version to 22.
src/gfx_api.rs	Uses new popups() accessor for IM popups during rendering/hit-testing.
src/config/handler.rs	IPC handlers for enable/disable, query, reload, and enable-unicode-input.
src/cli/input.rs	Adds seat simple-im CLI (enable/disable/reload).
jay-config/src/input.rs	Public API to control/query Simple IM and enable Unicode input.
jay-config/src/_private/ipc.rs	Extends IPC messages and responses for Simple IM control.
jay-config/src/_private/client.rs	Client-side IPC helpers for Simple IM.
Cargo.toml	Enables kbvm compose feature required by Simple IM.

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[Copilot]

Pull Request Overview

Copilot reviewed 29 out of 29 changed files in this pull request and generated 3 comments.

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_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

Pull Request Overview

Copilot reviewed 29 out of 29 changed files in this pull request and generated 3 comments.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}