fix(cli): include custom providers in provider ls

[chenmijiang]

Summary

Before this change, the CLI connected to the daemon without an appVersion. The server then treated it as a legacy client and filtered provider snapshot entries down to legacy built-in providers only, so custom providers could appear in the app settings but not in paseo provider ls.

This change:

• sends the CLI appVersion during daemon connection
• restores custom provider visibility in paseo provider ls
• adds a regression test for daemon-backed custom providers
• extracts CLI version resolution into a shared helper reused by both the CLI entrypoint and daemon client

Test plan

• npm run build --workspace=@getpaseo/cli
• npx tsx packages/cli/tests/15-provider.test.ts
• npx tsx packages/cli/tests/33-cli-version.test.ts