refactor: extract shared runCommand utility and cleanup codebase

- Create shared command utility in ts/utils/command.ts
- Update index.ts, process-manager.ts, system-info.ts to use shared utility
- Remove duplicate runCommand implementations from all files
- Remove legacy Chrome wrapper methods (startChrome, stopChrome, isChromeRunning)
- Consolidate Sway window selectors from 5 to 2
- Remove unused isobuild TypeScript files (mod.ts, deno.json, ts/index.ts)
- Make getStatus() async to properly await system info
- Add disk and system info sections to UI

ecoos_daemon/ts/utils/command.ts

@@ -0,0 +1,27 @@
+/**
+ * Shared command execution utility
+ */
+
+export interface CommandResult {
+  success: boolean;
+  stdout: string;
+  stderr: string;
+}
+
+export async function runCommand(
+  cmd: string,
+  args: string[]
+): Promise<CommandResult> {
+  const command = new Deno.Command(cmd, {
+    args,
+    stdout: 'piped',
+    stderr: 'piped',
+  });
+
+  const result = await command.output();
+  return {
+    success: result.success,
+    stdout: new TextDecoder().decode(result.stdout),
+    stderr: new TextDecoder().decode(result.stderr),
+  };
+}