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/src/doctor/config.rs

@@ -1,5 +1,5 @@
-//! Check user config files: `~/.agent-browser/config.json`,
-//! `./agent-browser.json`, and any file referenced by
+//! Check user config files: `~/.chrome-use/config.json`,
+//! `./chrome-use.json`, and any file referenced by
 //! `AGENT_BROWSER_CONFIG`.
 
 use std::env;
@@ -11,7 +11,7 @@ use super::{Check, Status};
 pub(super) fn check(checks: &mut Vec<Check>) {
     let category = "Config";
 
-    let user_path = dirs::home_dir().map(|d| d.join(".agent-browser").join("config.json"));
+    let user_path = dirs::home_dir().map(|d| d.join(".chrome-use").join("config.json"));
     if let Some(p) = user_path {
         if p.exists() {
             match parse_json_file(&p) {
@@ -34,7 +34,7 @@ pub(super) fn check(checks: &mut Vec<Check>) {
         }
     }
 
-    let project_path = PathBuf::from("agent-browser.json");
+    let project_path = PathBuf::from("chrome-use.json");
     if project_path.exists() {
         match parse_json_file(&project_path) {
             Ok(_) => checks.push(Check::new(