Add new skills and utilities for enhanced writing and testing

- Introduced graphviz conventions for visualizing process flows in writing skills.
- Added a comprehensive guide on persuasion principles to improve skill design effectiveness.
- Implemented a script to render graphviz diagrams from markdown files to SVG format.
- Created a detailed reference for testing skills with subagents, emphasizing TDD principles.
- Established a task tracker template for live task management.
- Developed a shell script to check the integrity of the antigravity profile and required files.
- Added test scripts to validate the initialization of agent projects.
- Created workflows for brainstorming, executing plans, and writing plans to streamline processes.

bin/antigravity-superpowers.js

@@ -0,0 +1,13 @@
+#!/usr/bin/env node
+
+import { runCli } from "../src/cli.js";
+
+runCli(process.argv.slice(2))
+  .then((exitCode) => {
+    process.exitCode = exitCode;
+  })
+  .catch((error) => {
+    const message = error instanceof Error ? error.message : String(error);
+    process.stderr.write(`${message}\n`);
+    process.exitCode = 1;
+  });