fix: remove duplicate .idea entry from DEFAULT_IGNORE_PATTERNS

Addresses review feedback to remove duplicate .idea pattern.

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Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: phernandez <paul@basicmachines.co>

Author: phernandez

src/basic_memory/ignore_utils.py

@@ -31,7 +31,6 @@
     ".mypy_cache",
     ".ruff_cache",
     ".obsidian",
-    ".idea",
 }