Fix 3 issues from CodeRabbit review

- Add prompt-snippets to Plugins list in CLAUDE.md
- Add `text` language specifier to fenced code blocks (MD040) in README.md and SKILL.md

Author: AnExiledDev

.devcontainer/CLAUDE.md

@@ -91,6 +91,7 @@ Declared in `settings.json` under `enabledPlugins`, auto-activated on start:
 - **ticket-workflow** — EARS ticket workflow + auto-linking
 - **notify-hook** — Desktop notifications on completion
 - **frontend-design** (Anthropic official) — UI/frontend design skill
+- **prompt-snippets** — Quick behavioral mode switches via /ps command
 
 ## Rules System
 

.devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/README.md

@@ -4,7 +4,7 @@ Quick behavioral mode switches via a single `/ps` slash command.
 
 ## Usage
 
-```
+```text
 /ps [snippet-name]
 ```
 
@@ -29,7 +29,7 @@ Type `/ps` followed by a snippet name to inject a behavioral directive for the r
 
 Combine snippets by listing multiple names:
 
-```
+```text
 /ps noaction brief
 ```
 

.devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/skills/ps/SKILL.md

@@ -30,7 +30,7 @@ If `$ARGUMENTS` does not match any snippet name, list all available snippets and
 
 Multiple snippets can be applied in one invocation by separating names with spaces:
 
-```
+```text
 /ps noaction brief
 ```