Fix README: prioritize source install, mark npm as not yet published

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -24,7 +24,10 @@ Superpowers is an incredible skill-based workflow system that gives AI coding as
 > **One command. Full profile. Ready to go.**
 
 ```bash
-npx antigravity-superpowers init
+git clone https://git.visssoft.com/hanh.tonguyen/antigravity-superpowers.git
+cd antigravity-superpowers
+npm link
+antigravity-superpowers init
 ```
 
 ---
@@ -45,19 +48,7 @@ npx antigravity-superpowers init
 
 ## Installation
 
-### Option 1: Run directly with npx (no install)
-
-```bash
-npx antigravity-superpowers init
-```
-
-### Option 2: Install globally from npm
-
-```bash
-npm install -g antigravity-superpowers
-```
-
-### Option 3: Install from source
+### Install from source
 
 ```bash
 git clone https://git.visssoft.com/hanh.tonguyen/antigravity-superpowers.git
@@ -65,13 +56,25 @@ cd antigravity-superpowers
 npm link
 ```
 
-After install, verify CLI is available:
+Verify CLI is available:
 
 ```bash
 antigravity-superpowers --version
 # 0.2.0
 ```
 
+### Install from npm (when published)
+
+> Package chưa được publish lên npm. Các lệnh dưới đây sẽ hoạt động sau khi publish.
+
+```bash
+# Run directly (no install)
+npx antigravity-superpowers init
+
+# Or install globally
+npm install -g antigravity-superpowers
+```
+
 ---
 
 ## Usage