Refine Antigravity format documentation

Updated documentation to remove 'Google' from Antigravity references.

Author: Parveen-Birthaliya

src/formats/antigravity.py

@@ -5,15 +5,15 @@
 """
 Antigravity Format Implementation
 
-Generates .md rule files for Google Antigravity with YAML frontmatter.
+Generates .md rule files for Antigravity with YAML frontmatter.
 """
 
 from formats.base import BaseFormat, ProcessedRule
 
 
 class AntigravityFormat(BaseFormat):
     """
-    Google Antigravity format implementation (.md rule files).
+    Antigravity format implementation (.md rule files).
 
     Antigravity uses .md files with YAML frontmatter containing:
     - trigger: 'always_on' or 'glob' (activation type)