rebrand: agent-browser-stealth → chrome-use, de-fork, reset to v1.0.0

Standalone product rename across the whole repo (issue: project identity):

- Binary/package/repo/skill/docs: agent-browser[-stealth] → chrome-use
  (single binary name `chrome-use`; old aliases agent-browser/abs dropped).
- Version: 0.27.0-fork.51 → 1.0.0 (drop the upstream-fork counter).
- Native-messaging host: com.agent_browser.connect → com.leeguoo.chrome_use
  (CLI + ab-connect extension in lockstep — this is a breaking handshake change,
  extension bumped 0.4.2 → 0.5.0, needs a Web Store republish).
- Config dir: ~/.agent-browser → ~/.chrome-use.
- README/zh: reframed from "stealth fork of agent-browser" to a standalone
  product with a small `originally based on vercel-labs/agent-browser` credit.
- Kept AGENT_BROWSER_* env vars working (63 vars across the codebase; renaming
  them would break every existing script/skill for no user-facing gain).

Build green, 802 unit tests pass, fmt + clippy clean. Upstream attribution to
vercel-labs/agent-browser preserved.

cli/tests/doctor_cli.rs

@@ -1,4 +1,4 @@
-//! Integration tests for `agent-browser doctor`.
+//! Integration tests for `chrome-use doctor`.
 //!
 //! These tests spawn the real CLI binary via `env!("CARGO_BIN_EXE_*")` and
 //! verify the doctor command produces sane output. They override
@@ -8,7 +8,7 @@
 use std::process::Command;
 use tempfile::TempDir;
 
-const BIN: &str = env!("CARGO_BIN_EXE_agent-browser");
+const BIN: &str = env!("CARGO_BIN_EXE_chrome-use");
 
 fn build_doctor_cmd(tmp: &TempDir, args: &[&str]) -> Command {
     let socket_dir = tmp.path().join("sockets");
@@ -45,7 +45,7 @@ fn doctor_offline_quick_json_emits_valid_payload() {
 
     let output = build_doctor_cmd(&tmp, &["doctor", "--offline", "--quick", "--json"])
         .output()
-        .expect("failed to invoke agent-browser doctor");
+        .expect("failed to invoke chrome-use doctor");
 
     let code = output.status.code().unwrap_or(-1);
     let stdout = String::from_utf8(output.stdout).expect("stdout should be utf8");
@@ -123,7 +123,7 @@ fn doctor_help_describes_flags_and_examples() {
 
     let output = build_doctor_cmd(&tmp, &["doctor", "--help"])
         .output()
-        .expect("failed to invoke agent-browser doctor --help");
+        .expect("failed to invoke chrome-use doctor --help");
 
     assert!(
         output.status.success(),
@@ -134,7 +134,7 @@ fn doctor_help_describes_flags_and_examples() {
     let stdout = String::from_utf8(output.stdout).expect("stdout should be utf8");
 
     for needle in [
-        "agent-browser doctor",
+        "chrome-use doctor",
         "--offline",
         "--quick",
         "--fix",