fix: forward Lua version features from selene-lib to CLI crate

[roobie]

The selene-lib crate defines lua52, lua53, lua54, and luajit as default features (enabling the corresponding full_moon parser features), but the selene CLI crate imports selene-lib with default-features = false and only re-exports the roblox feature. This means cargo install selene and the GitHub release binaries cannot parse Lua 5.2+ syntax (goto/labels), LuaJIT extensions (ULL number suffixes), or \x hex string escapes.

Forward all four Lua version features through the CLI crate and include them in its default feature set, matching selene-lib's own defaults.

Fixes #581

This PR was assisted by AI

[nurpax]

I noticed a weird subtlety related to this.

I've sent this PR #646 which fixed the problem for me (the propagation of lua version). However, I now stumbled upon your change and I started wondering why did my change fix the problem for me, when your change looks like it should be required too.

Well, I was building my selene binary with cargo build --release and not with cargo install selene (or running cargo run -p selene). If building selene with cargo build it seems like the defaults are picked for the full workspace which then sets more defaults than the selene/Cargo.toml.

I verified this theory with the below repros:

 # selene.toml
std = "lua53"

-- test.lua
local x = 1 & 2

running cargo run -p selene -- --config selene.toml test.lua fails with

ERROR: lua version lua53 in standard library, but feature for it is not enabled
ERROR: lua version lua52 in standard library, but feature for it is not enabled
error[parse_error]: unexpected character &
  ┌─ test.lua:1:13
  │
1 │ local x = 1 & 2
  │             ^

error[parse_error]: unexpected token `2`
  ┌─ test.lua:1:15
  │
1 │ local x = 1 & 2
  │               ^ unexpected token, this needs to be a statement

but it works fine if I instead do:

cargo build --release
../target/release/selene --config selene.toml test.lua

So IMO both PRs are needed. Mine fixes Lua version inheritance in config files and yours adds the right build time feature enables.