input: use std.Io.Writer for key encoder, new API, expose via libghostty

This modernizes `KeyEncoder` to a new `std.Io.Writer`-based API.
Additionally, instead of a single struct, it is now an `encode` function
that takes a series of more focused options. This is more idiomatic Zig
while also making it easier to expose via libghostty-vt.

libghostty-vt also gains access to key encoding APIs.
This commit is contained in:
Mitchell Hashimoto
2025-10-04 15:04:52 -07:00
parent 503a25653f
commit 44496df899
11 changed files with 880 additions and 891 deletions

2287
src/input/key_encode.zig Normal file

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