x.crypto.chacha20 Cipher struct should be public

[einar-hjortdal]

Describe the bug

It is mentioned in comments that Cipher should be used if needed, but it is private, so it can't be used.

Reproduction Steps

import x.crypto.chacha20
struct MyStruct {
le_cipher &chacha20.Cipher
}

Expected Behavior

Could define struct

Current Behavior

Can't define struct

struct x.crypto.chacha20.Cipher was declared as private to module x.crypto.chacha20, so it can not be used inside module

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.7 b5452e0

Environment details (OS name and version, etc.)

V full version: V 0.4.7 c2f7afd.b5452e0
OS: linux, Linux version 5.14.0-427.26.1.el9_4.x86_64 (mockbuild@pp-el9) (gcc (GCC) 11.4.1 20231218 (Red Hat 11.4.1-3), GNU ld version 2.35.2-43.el9) #1 SMP PREEMPT_DYNAMIC Wed Jul 17 15:28:16 CEST 2024
Processor: 8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz

getwd: /home/coachonko/Documents/projects/vlang/firebird
vexe: /home/coachonko/.local/lib64/v/v
vexe mtime: 2024-07-28 07:13:47

vroot: OK, value: /home/coachonko/.local/lib64/v
VMODULES: OK, value: /home/coachonko/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.43.5
Git vroot status: weekly.2024.28-73-gb5452e0a (16 commit(s) behind V master)
.git/config present: true

CC version: cc (GCC) 11.4.1 20231218 (Red Hat 11.4.1-3)
thirdparty/tcc status: thirdparty-linux-amd64 a0799a5b

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