Modern usage of this control function comes from the BiDi draft
proposal:

https://terminal-wg.pages.freedesktop.org/bidi/recommendation/escape-sequences.html

The draft slightly extends the definition in ECMA-48.

Signed-off-by: Mohammad AlSaleh <CE.Mohammad.AlSaleh@gmail.com>

Fixes #100.

The modes could overlap and there's also no way to actually
forward information about unhandled modes downstream, thus
split the modes into 2 separate structures and pass unhandled
modes.

Given that an example of the translation table is not present by xterm
and they provide only script to generate one from the running X11
system, the example of the output is also included in the repository
now.

Co-authored-by: Christian Duerr <contact@christianduerr.com>

See alacritty/alacritty#6845.

This just adds handling of the CSI u escapes mentioned in the spec
and don't provide key to escape sequence transformation for the terminals.

Links: https://sw.kovidgoyal.net/kitty/keyboard-protocol

The OSC buffer limit was set to 1024 bytes by default for no-std
targets. Especially when operating in a restricted environment where OSC
escapes are irrelevant, this consumes a lot of unnecessary memory.

This patch adds a const generic that allows controlling the target size
of the OSC buffer at compile-time, making it possible to remove the
buffer entirely if OSCs are not required.

Co-authored-by: Christian Duerr <contact@christianduerr.com>