Fix: Remove all Deno dependencies and fix npx/global execution

## Problem
The `claude-flow init` command was failing when run with `npx claude-flow init` or global `claude-flow init` commands because:

1. **Deno APIs throughout codebase** - The init system was using `Deno.writeTextFile`, `Deno.mkdir`, etc. which don't exist in Node.js
2. **Working directory issues** - Commands were executing in wrong directory due to spawn() configuration
3. **Command routing problems** - TypeScript CLI was being used instead of working JavaScript CLI

## Solution
✅ **Completely removed all Deno dependencies** and replaced with Node.js equivalents:

### File System Operations Fixed:
- `Deno.writeTextFile()` → `fs.writeFile()`
- `Deno.mkdir()` → `fs.mkdir()`
- `Deno.stat()` → `fs.stat()`
- `Deno.Command()` → `execSync()`
- `Deno.env.get()` → `process.env`
- `Deno.cwd()` → `process.cwd()`

### Command Routing Fixed:
- Added init, hooks, mcp commands to simple-cli.js routing in cli.mjs
- Fixed working directory by using `process.cwd()` instead of `__dirname`
- Properly imported `fs/promises` and `child_process`

### Template System Fixed:
- Silenced non-fatal template loading errors
- All commands now use fallback content when templates missing

## Testing Results
✅ All invocation methods now work correctly:

```bash
# Local wrapper - WORKS
./claude-flow init --force

# NPX command - WORKS
npx claude-flow init --force

# Global command - WORKS
claude-flow init --force
```

✅ **Files properly created**:
- `CLAUDE.md` (8455 bytes)
- `.claude/settings.json` (Claude Code hooks)
- `.claude/commands/` (All documentation)
- `.claude/helpers/` (Setup scripts)
- Memory and coordination directories

## Impact
- **No more Deno dependencies** - Pure Node.js/npm workflow
- **Consistent behavior** across all command invocation methods
- **Proper Claude Code integration** with working hooks
- **Production ready** for npm publishing

Fixes the core issue where users couldn't run `npx claude-flow init` successfully.

Start by tracing command routing in cli.mjs and simple-cli.js, then inspect the init system for the listed Deno APIs and the fs/promises and child_process replacements. Run the local, npx, and global init commands with --force; done means each invocation uses the correct working directory and creates the listed Claude configuration files without Deno dependencies.

Written by the indexing model from the issue text.