Break up interdependencies of command crates (#9429)

# Description
Make sure that our different crates that contain commands can be
compiled in parallel.
This can under certain circumstances accelerate the compilation with
sufficient multithreading available.

## Details
- Move `help` commands from `nu-cmd-lang` back to `nu-command`
- This also makes sense as the commands are implemented in an
ANSI-terminal specific way
- Make `nu-cmd-lang` only a dev dependency for `nu-command`
- Change context creation helpers for `nu-cmd-extra` and
`nu-cmd-dataframe` to have a consistent api used in
`src/main.rs`:`get_engine_state()`
- `nu-command` now indepedent from `nu-cmd-extra` and `nu-cmd-dataframe`
that are now dependencies of `nu` directly. (change to internal
features)
- Fix tests that previously used `nu-command::create_default_context()`
with replacement functions

## From scratch compilation times:

just debug (dev) build and default features
```
cargo clean --profile dev && cargo build --timings
```

### before

![grafik](https://github.com/nushell/nushell/assets/15833959/e49f1f42-2e53-4a6c-bc23-625b686af1bc)

### after

![grafik](https://github.com/nushell/nushell/assets/15833959/8dec4723-e625-4a86-b91e-e6e808f64726)

# User-Facing Changes
None direct, only change to compilation on multithreaded jobs expected.

# Tests + Formatting
Tests that previously chose to use `nu-command` for their scope will
still use `nu-cmd-lang` + `nu-command` (command list in the granularity
at the time)

crates/nu-cmd-extra/src/extra/mod.rs

@@ -1,9 +1,12 @@
 mod bits;
 
-use nu_protocol::engine::StateWorkingSet;
+use nu_protocol::engine::{EngineState, StateWorkingSet};
 
-pub fn add_extra_decls(working_set: &mut StateWorkingSet) {
-    macro_rules! bind_command {
+pub fn add_extra_command_context(mut engine_state: EngineState) -> EngineState {
+    let delta = {
+        let mut working_set = StateWorkingSet::new(&engine_state);
+
+        macro_rules! bind_command {
             ( $command:expr ) => {
                 working_set.add_decl(Box::new($command));
             };
@@ -12,15 +15,23 @@ pub fn add_extra_decls(working_set: &mut StateWorkingSet) {
             };
         }
 
-    bind_command!(
-        bits::bits_::Bits,
-        bits::and::BitsAnd,
-        bits::not::BitsNot,
-        bits::or::BitsOr,
-        bits::xor::BitsXor,
-        bits::rotate_left::BitsRol,
-        bits::rotate_right::BitsRor,
-        bits::shift_left::BitsShl,
-        bits::shift_right::BitsShr
-    );
+        bind_command!(
+            bits::bits_::Bits,
+            bits::and::BitsAnd,
+            bits::not::BitsNot,
+            bits::or::BitsOr,
+            bits::xor::BitsXor,
+            bits::rotate_left::BitsRol,
+            bits::rotate_right::BitsRor,
+            bits::shift_left::BitsShl,
+            bits::shift_right::BitsShr
+        );
+        working_set.render()
+    };
+
+    if let Err(err) = engine_state.merge_delta(delta) {
+        eprintln!("Error creating extra command context: {err:?}");
+    }
+
+    engine_state
 }