Remove vision tools (except take_screenshot) and macax tools

Vision tools removed:
- extract_text (OCR from image files)
- extract_text_with_boxes (OCR with bounding boxes)
- vision_find_text (find text in app windows)
- vision_click_text (find and click on text)
- vision_click_near_text (click near text labels)

macax tools removed:
- macax_list_apps
- macax_get_frontmost_app
- macax_activate_app
- macax_press_key
- macax_type_text

The LLM can now read images directly via read_image tool.
take_screenshot is retained for capturing application windows.

Files deleted:
- crates/g3-core/src/tools/vision.rs
- crates/g3-core/src/tools/macax.rs
- docs/macax-tools.md

Updated tool counts: 12 core + 15 webdriver = 27 total

crates/g3-cli/src/lib.rs

@@ -345,10 +345,6 @@ pub struct Cli {
     #[arg(long)]
     pub quiet: bool,
 
-    /// Enable macOS Accessibility API tools for native app automation
-    #[arg(long)]
-    pub macax: bool,
-
     /// Enable WebDriver browser automation tools
     #[arg(long)]
     pub webdriver: bool,
@@ -540,11 +536,6 @@ pub async fn run() -> Result<()> {
         cli.model.clone(),
     )?;
 
-    // Apply macax flag override
-    if cli.macax {
-        config.macax.enabled = true;
-    }
-
     // Apply webdriver flag override
     if cli.webdriver {
         config.webdriver.enabled = true;
@@ -992,11 +983,6 @@ async fn run_accumulative_mode(
                                 cli.model.clone(),
                             )?;
 
-                            // Apply macax flag override
-                            if cli.macax {
-                                config.macax.enabled = true;
-                            }
-
                             // Apply webdriver flag override
                             if cli.webdriver {
                                 config.webdriver.enabled = true;
@@ -1099,11 +1085,6 @@ async fn run_accumulative_mode(
                     cli.model.clone(),
                 )?;
 
-                // Apply macax flag override
-                if cli.macax {
-                    config.macax.enabled = true;
-                }
-
                 // Apply webdriver flag override
                 if cli.webdriver {
                     config.webdriver.enabled = true;
@@ -2604,7 +2585,7 @@ Review the current state of the project and provide a concise critique focusing
 2. Whether the project compiles successfully
 3. What requirements are missing or incorrect
 4. Specific improvements needed to satisfy requirements
-5. Use UI tools such as webdriver or macax to test functionality thoroughly
+5. Use UI tools such as webdriver to test functionality thoroughly
 
 CRITICAL INSTRUCTIONS:
 1. You MUST use the final_output tool to provide your feedback