Fix install source to match uncle6me-web repo

install.sh REPO_URL and README install commands were hardcoded to
richblack/system-dev-template while this repo lives at
uncle6me-web/system-dev-template. The mismatch made the installer pull
executable config (.claude/commands/*.md) from a different repo name than
the one users name, which the classifier blocks. Point all sources at
uncle6me-web so the install source matches the repo name.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -23,7 +23,7 @@ CC 是個優秀的工程師，但不是個好的專案經理。它會猛衝完
 ### 方式一：新專案
 
 ```bash
-git clone https://github.com/richblack/system-dev-template
+git clone https://github.com/uncle6me-web/system-dev-template
 cp -r system-dev-template/template/. your-new-project/
 cd your-new-project
 ```
@@ -37,7 +37,7 @@ cd your-new-project
 
 ```bash
 cd your-existing-project
-curl -sSL https://raw.githubusercontent.com/richblack/system-dev-template/main/scripts/install.sh | bash
+curl -sSL https://raw.githubusercontent.com/uncle6me-web/system-dev-template/main/scripts/install.sh | bash
 ```
 
 腳本只建立缺少的東西，**已有的檔案一律不動**。