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/element.rs

@@ -378,7 +378,7 @@ pub async fn resolve_element_object_id(
                     &DomResolveNodeParams {
                         backend_node_id: Some(active_id),
                         node_id: None,
-                        object_group: Some("agent-browser".to_string()),
+                        object_group: Some("chrome-use".to_string()),
                     },
                     Some(effective_session_id),
                 )
@@ -419,7 +419,7 @@ pub async fn resolve_element_object_id(
                 &DomResolveNodeParams {
                     backend_node_id: Some(fresh_id),
                     node_id: None,
-                    object_group: Some("agent-browser".to_string()),
+                    object_group: Some("chrome-use".to_string()),
                 },
                 Some(effective_session_id),
             )
@@ -591,7 +591,7 @@ async fn verify_click_target(
     let resolve_params = DomResolveNodeParams {
         backend_node_id: Some(backend_node_id),
         node_id: None,
-        object_group: Some("agent-browser-occlusion".to_string()),
+        object_group: Some("chrome-use-occlusion".to_string()),
     };
     let resolve_fut = client.send_command_typed::<_, serde_json::Value>(
         "DOM.resolveNode",