Fix --no-git argument resolution.

The --no-git argument was superfluous as it was set to True
by default.
This commit flips this, and assumes
git is not available, and will check and update only if the user
asks for it (--no-git == False).
To make this more clear I have renamed the variable to
should_init_git.

src/specify_cli/__init__.py

@@ -794,10 +794,11 @@ def init(
     ))
     
     # Check git only if we might need it (not --no-git)
-    git_available = True
+    # Only set to True if the user wants it and the tool is available
+    should_init_git = False
     if not no_git:
-        git_available = check_tool("git", "https://git-scm.com/downloads")
-        if not git_available:
+        should_init_git = check_tool("git", "https://git-scm.com/downloads")
+        if not should_init_git:
             console.print("[yellow]Git not found - will skip repository initialization[/yellow]")
 
     # AI assistant selection
@@ -893,7 +894,7 @@ def init(
                 tracker.start("git")
                 if is_git_repo(project_path):
                     tracker.complete("git", "existing repo detected")
-                elif git_available:
+                elif should_init_git:
                     if init_git_repo(project_path, quiet=True):
                         tracker.complete("git", "initialized")
                     else: