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/native/browser.rs

@@ -221,7 +221,7 @@ impl TabRef {
         if input.chars().all(|c| c.is_ascii_digit()) {
             return Err(format!(
                 "Expected a tab id like `t{}` or a label; positional integers are not accepted \
-                 (run `agent-browser tab` to list stable tab ids)",
+                 (run `chrome-use tab` to list stable tab ids)",
                 input
             ));
         }
@@ -1179,7 +1179,7 @@ impl BrowserManager {
                     Ok(*id)
                 } else {
                     Err(format!(
-                        "Tab {} not found; run `agent-browser tab` to list open tabs",
+                        "Tab {} not found; run `chrome-use tab` to list open tabs",
                         format_tab_id(*id)
                     ))
                 }
@@ -1191,7 +1191,7 @@ impl BrowserManager {
                 .map(|p| p.tab_id)
                 .ok_or_else(|| {
                     format!(
-                        "No tab with label `{}`; run `agent-browser tab` to list open tabs",
+                        "No tab with label `{}`; run `chrome-use tab` to list open tabs",
                         name
                     )
                 }),