Add conversion libraries to bot

[pmenendz]

No description provided.

[Copilot]

Pull Request Overview

This PR adds support for multiple GOBL conversion libraries across various repos and updates related documentation and configuration.

• Introduces a list of available conversion repositories and updates the agent to handle them.
• Extends the GOBL docs and code tool descriptions to reference all conversion libraries.
• Updates configuration and README to reflect the new model version and list of supported repos.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/expert/prompts/system_prompt.md	Simplified system prompt and added conversion libraries mention.
src/expert/prompts/gobl_docs_description.md	Adjusted GOBL docs tool description and added fallback note.
src/expert/prompts/gobl_code_description.md	Expanded code tool scope to multiple conversion repos.
src/expert/agent.py	Added AVAILABLE_REPOS, updated tool schema and response logic.
config.yaml	Changed model identifier to “gpt-4.1”.
README.md	Listed all supported GOBL conversion repositories.

Comments suppressed due to low confidence (2)

src/expert/prompts/gobl_docs_description.md:8

• The same line about addons is duplicated twice (lines 8 and 9). Consider removing the duplicate to avoid confusion.

- Addons which provide additional extension definitions that augment the basic functionality of a GOBL document with the characteristics of a specific invoice format. We have one addon per invoice format.

src/expert/prompts/gobl_docs_description.md:21

• The fallback instruction points only to the invopop/gobl repo, but the code now supports multiple conversion repositories. Update this line to reference the general code search tool across all available repos.

The GOBL docs might be incomplete of information, if something is not found here, use the `search_gobl_code` tool in the `invopop/gobl` repo.