feat: implement time module

[RonnieSalomonsen]

Port of the time module.

I've implemented time.now(), no rule changes should be needed. Used @Blacksyke magic module as template for this module. @wxsBSD and @Blacksyke decided it was best to add a minimal protobuf specification rather than hack the build scripts to account for modules that only have exported functions and return no data, like this one.

cargo test --package yara-x --lib --features time-module -- modules::time::tests --nocapture

   Compiling yara-x v0.1.0 (yara-x/yara-x)
    Finished test [unoptimized + debuginfo] target(s) in 1.76s
     Running unittests src/lib.rs (target/debug/deps/yara_x-56a7c9914ffab9dd)

running 1 test
test modules::time::tests::e2e_test ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 32 filtered out; finished in 0.19s

[RonnieSalomonsen]

Cleaned up the code for Time module and added unit test to module source as a sub module. Let me know what you think.

cargo test --package yara-x --lib --features time-module -- modules::time --nocapture

   Compiling yara-x v0.1.0 (yara-x/yara-x)
    Finished test [unoptimized + debuginfo] target(s) in 7.41s
     Running unittests src/lib.rs (target/debug/deps/yara_x-66a842ed67eaa9e0)

running 1 test
test modules::time::tests::end2end ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 32 filtered out; finished in 0.17s

[plusvic]

Also, don't forget to run rustfmt on the source code before committing. My advice is configuring your IDE to do so automatically on file save.

[RonnieSalomonsen]

Thank. I have configured vscode to run rust.analyzer on save