Add meta information to ast nodes in `tlb-parser`

[Nikita Sobolev]

Summary

We need to add meta things to nodes in tlb parser, like:

• parents
• locations
• ast.walk function

This is a follow up to #89

Context

No response

Goals

• Provide an API to report errors in the future
• Provide an API to traverse ast tree

Deliverables

Published PR with the changes

Definition of Done

• PR is merged after successful CI

Reward

• 1000$ worth of TON on the moment of footstep completion.

Total: $1000

[Narek Abovyan]

LGTM

[Daniil Sedov]

LGTM