Yassine/add tlc support

[beu5a]

This PR adds TLC (the TLA+ model checker) as an alternative backend for quint verify, alongside the existing Apalache backend.

Usage

quint verify --backend=tlc spec.qnt

quint verify --backend=tlc --tlc-config=tlc.json spec.qnt

Example tlc.json:

  {
    "maxHeap": "-Xmx16G",
    "stackSize": "-Xss1G",
    "workers": 4
  }

Features

• New --backend=tlc option for the verify command
• TLC runs using the JAR bundled with Apalache (requires Apalache to be downloaded first)

Code organization

• tlc.ts - TLC model checker interface
• quintMCWrapper.ts - Unified wrapper for model checkers (Apalache, TLC)
• Moved result processing to cliReporting.ts

Limitations

• No ITF trace output for TLC (counterexamples printed to stdout by TLC)
• Requires Apalache JAR to be present

• I have read and I understand the Note on AI-assisted contributions
• Changes manually tested locally and confirmed to work as described
  (including screenshots is helpful)
• Tests added for any new code
• Documentation added for any new functionality
• Entries added to the respective CHANGELOG.md for any new functionality