[Skils] Antigravityu 2.0 skills directory location should be updated

[abn]

Describe the bug
With the launch of Antigravity 2.0, the locations for global skills etc. have changed. For reference, see: https://github.com/abn/nowledge-mem-google-antigravity.
The supported locations for skills are:

Location	Scope
<workspace-root>/.agents/skills/<skill-folder>/	Workspace-specific (also falls back to .agent/skills/)
~/.gemini/config/skills/<skill-folder>/	Global (all workspaces)

At present, Nowledge Mem enables sills for Antigravity at ~/.gemini/antigravity/skills and for Gemini CLI at ~/.gemini/skills/. Both of which are now deprecated.

Antitravity 2.0 (Hub) needs the global skills to be located at ~/.gemini/config/skills.

To Reproduce
Steps to reproduce the behavior:

1. Enable skills for Antigravity

Expected behavior
Antigravity detects skill.

[abn]

Workaround till this is fixed:

ln -sf ~/.gemini/skills ~/.gemini/config/skills