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/skills.rs

@@ -47,7 +47,7 @@ fn find_package_root() -> Option<PathBuf> {
     if let Ok(exe) = env::current_exe() {
         let exe = exe.canonicalize().unwrap_or(exe);
         if let Some(parent) = exe.parent() {
-            // npm install layout: bin/agent-browser-* -> ../
+            // npm install layout: bin/chrome-use-* -> ../
             let candidate = parent.join("..");
             if candidate.join("skills").is_dir() {
                 return Some(candidate.canonicalize().unwrap_or(candidate));
@@ -77,7 +77,7 @@ fn find_package_root() -> Option<PathBuf> {
 /// upgraded binary re-extracts fresh content.
 fn embedded_skills_root() -> Option<PathBuf> {
     let base = dirs::cache_dir()?
-        .join("agent-browser")
+        .join("chrome-use")
         .join(concat!("skills-", env!("CARGO_PKG_VERSION")));
     let marker = base.join(".extracted");
     if !marker.exists() {
@@ -344,13 +344,13 @@ fn run_get(skills_dirs: &[PathBuf], names: &[String], get_all: bool, full: bool,
                 "{}",
                 serde_json::to_string(&json!({
                     "success": false,
-                    "error": "No skill name provided. Usage: agent-browser skills get <name>",
+                    "error": "No skill name provided. Usage: chrome-use skills get <name>",
                 }))
                 .unwrap_or_default()
             );
         } else {
             eprintln!(
-                "{} No skill name provided. Usage: agent-browser skills get <name>",
+                "{} No skill name provided. Usage: chrome-use skills get <name>",
                 color::error_indicator()
             );
         }