Fix Antigravity skills path (#31)

Update the default install path for Antigravity from:
  ~/.gemini/antigravity/global_skills
to:
  ~/.gemini/antigravity/skills

This aligns with the official Antigravity documentation:
https://antigravity.google/docs/skills

Author: ibrahimkteish

README.md

@@ -30,7 +30,7 @@ A CLI tool for downloading and managing [Point-Free Way](https://www.pointfree.c
 |------|--------------|
 | `agents` (generic) | `~/.agents/skills` |
 | [`amp`](https://ampcode.com/manual#agent-skills) | `~/.agents/skills` |
-| [`antigravity`](https://antigravity.google/docs/skills) | `~/.gemini/antigravity/global_skills` |
+| [`antigravity`](https://antigravity.google/docs/skills) | `~/.gemini/antigravity/skills` |
 | [`claude`](https://code.claude.com/docs/en/skills) | `~/.claude/skills` |
 | [`codex`](https://developers.openai.com/codex/skills/) | `~/.codex/skills` |
 | [`copilot`](https://docs.github.com/en/copilot/concepts/agents/about-agent-skills) | `~/.copilot/skills` |

Sources/pfw/Install.swift

@@ -31,7 +31,7 @@ struct Install: AsyncParsableCommand {
       case .amp:
         return home.appending(path: ".agents/skills")
       case .antigravity:
-        return home.appending(path: ".gemini/antigravity/global_skills")
+        return home.appending(path: ".gemini/antigravity/skills")
       case .droid:
         return home.appending(path: ".factory/skills")
       case .opencode:

Tests/pfwTests/InstallTests.swift

@@ -567,7 +567,7 @@ extension BaseSuite {
         try await assertCommand(["install", "--tool", "antigravity"]) {
           """
           Installed skills:
-            • antigravity: /Users/blob/.gemini/antigravity/global_skills
+            • antigravity: /Users/blob/.gemini/antigravity/skills
           """
         }
         assertInlineSnapshot(of: fileSystem, as: .description) {
@@ -576,7 +576,7 @@ extension BaseSuite {
             blob/
               .gemini/
                 antigravity/
-                  global_skills/
+                  skills/
                     pfw-ComposableArchitecture@ -> /Users/blob/.pfw/skills/ComposableArchitecture
                     pfw-SQLiteData@ -> /Users/blob/.pfw/skills/SQLiteData
               .pfw/