proto becomes bxcore, the one shared crate (M5b task 00)

Done the way the owner asked and the spike mapped: the crate and the
manifests renamed, then what the build reported fixed. Layers: 138
"proto unresolved" errors across 169 files; cargo fmt reordering
imports; six fixture paths built as strings in brokerd's and bxctl's
tests, which the compiler cannot see, and comments naming
crates/proto/; the crate-dependency check and its self-test. One more
the spike did not reach: a `\nproto =` key inside a printf format in
the self-test, which a word-boundary replacement skips because `n` and
`p` are both word characters.

make gate: gate: ok, 944 tests; no new entry in /tmp.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

crates/toolkit/src/egress.rs

@@ -30,11 +30,11 @@ pub struct Allow {
 
 impl Allow {
     /// One or more host patterns separated by ','. Every piece must pass
-    /// `proto::hosts::valid_host_pattern`; an empty piece (",", "a.com,", "") is an error.
+    /// `bxcore::hosts::valid_host_pattern`; an empty piece (",", "a.com,", "") is an error.
     pub fn parse(list: &str) -> Result<Allow, String> {
         let mut patterns = Vec::new();
         for piece in list.split(',') {
-            if !proto::hosts::valid_host_pattern(piece) {
+            if !bxcore::hosts::valid_host_pattern(piece) {
                 return Err(format!("'{piece}' is not a host or a *.host"));
             }
             patterns.push(piece.to_string());
@@ -44,11 +44,11 @@ impl Allow {
 
     /// `valid_host(host)` and some pattern `host_matches` it.
     pub fn permits(&self, host: &str) -> bool {
-        proto::hosts::valid_host(host)
+        bxcore::hosts::valid_host(host)
             && self
                 .patterns
                 .iter()
-                .any(|p| proto::hosts::host_matches(p, host))
+                .any(|p| bxcore::hosts::host_matches(p, host))
     }
 }
 

crates/toolkit/src/fetch.rs

@@ -7,7 +7,7 @@ use std::io::{self, Read};
 use std::path::Path;
 use std::process::{Command, Stdio};
 
-use proto::tools::HttpFetchArgs;
+use bxcore::tools::HttpFetchArgs;
 
 use crate::Outcome;
 

crates/toolkit/src/files.rs

@@ -5,7 +5,7 @@ use std::fs;
 use std::io::Read;
 use std::path::Path;
 
-use proto::tools::{ReadFileArgs, WriteFileArgs};
+use bxcore::tools::{ReadFileArgs, WriteFileArgs};
 
 use crate::Outcome;
 

crates/toolkit/src/lib.rs

@@ -1,6 +1,6 @@
 //! The programs that run inside tool containers.
 
-use proto::tools::{HttpFetchArgs, ReadFileArgs, ShellArgs, WriteFileArgs};
+use bxcore::tools::{HttpFetchArgs, ReadFileArgs, ShellArgs, WriteFileArgs};
 
 pub mod addr;
 pub mod egress;

crates/toolkit/src/shell.rs

@@ -7,7 +7,7 @@ use std::os::unix::process::ExitStatusExt;
 use std::path::Path;
 use std::process::{Command, Stdio};
 
-use proto::tools::ShellArgs;
+use bxcore::tools::ShellArgs;
 
 use crate::Outcome;