Implement lazy-read and noshell raw mode

[garazdawi]

This PR implements a couple of new fetures to how stdin and stdout is handled by Erlang.

• All reads from stdin are now done upon request, instead of greedingly reading all data. So it is only when an io:get_line/2 or equivilant is issued by the Erlang program that a read is done. This solves #8113 and also the problem mentioned by Josè here. This change also basically makes the -noinput flag obsolete, as no data will be read from stdin without it being requested.

• The noshell mode has been updated to have two "submodes" called raw or cooked, where cooked is the old default behaviour and raw can be used to bypass the line editing support of the native terminal. Using raw mode it is possible to read keystrokes as they happen without the user having to type Enter. The raw mode also does not echo the typed characters to stdout. An example of how to create a tic-tac-toe game using this mechanism is included in the documentation. This solves #8037.

• There is also a new guide added that shows how to create a custom shell with autocomplete using Erlang's builtin line editor (basically what Elixir, Luerl and other do).

[github-actions[bot]]

CT Test Results

    6 files    303 suites   3h 10m 25s :stopwatch: 5 401 tests 5 070 :white_check_mark: 330 :zzz: 1 :x: 7 972 runs  7 544 :white_check_mark: 427 :zzz: 1 :x:

For more details on these failures, see this check.

Results for commit 28953cea.

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// Erlang/OTP Github Action Bot

[garazdawi]

You can read the new guides here: *Creating a custom shell

*Creating a terminal application

[EliasDerHai]

You can read the new guides here:

* [Creating a custom shell](https://erlang.github.io/prs/8962/lib/stdlib-6.1.2/doc/html/custom_shell.html)

* [Creating a terminal application](https://erlang.github.io/prs/8962/lib/stdlib-6.1.2/doc/html/terminal_interface.html)

broken links

[frazze-jobb]

They can now be found in the official documentation

• Creating a custom shell

• Creating a terminal application

I updated the links above as well

[wmealing]

As a heads up. The "Creating a terminal application" links to https://www.erlang.org/doc/apps/stdlib/assets/tic-tac-toe.es, which has a problem.

The board characters served up the browser seem strangely encoded.

But when I use curl/wget it is encoded correctly.

I'll be looking where to report this correctly, but for now I'll report it here in case anyone trips over it.

[wmealing]

Probably a character encoding issue on the server.

I think the problem is that its serving this file as:

Content-Type: application/ecmascript

While it should be:

Content-Type: text/html; charset=utf-8