[codex] Port selected addons to Odoo 19.0

[ayushin]

Summary

Ports the selected 18.0 addons onto the Odoo 19.0 branch:

• llm_ollama
• web_json_editor
• llm_tool_account
• llm_tool_mis_builder
• llm_tool_website
• llm_anthropic
• llm_openai
• llm_training
• llm_mistral

This also updates the root README to reflect the newly ported modules and the remaining modules still pending for 19.0.

Porting Notes

• Bumped restored module manifests to 19.0.1.0.0.
• Restored core mail.message attachment helpers needed by OpenAI and Anthropic multimodal/audio message formatting.
• Allowed provider format_messages() to pass provider-specific keyword arguments such as the selected model record.
• Fixed Ollama LLM role checks to use the dict result returned by the core role helper methods.
• Updated web_json_editor for the Odoo 19 web client jsonb field type and current field option extraction.
• Fixed the mutable default for training job hyperparameters.
• Cleaned restored RST docs so staged diff checks do not flag conflict-marker-like heading underlines.

Validation

Passed:

• git diff --check --cached
• Python syntax parse across llm and all newly ported modules
• XML parse across all newly ported modules
• Odoo old-view-marker scan for <tree, attrs=, states=, and editable="false"
• @llm_tool type-hint scan for the restored domain tool packs
• node --check for the JSON editor frontend files

Not run successfully:

• Ruff: direct ruff is too old for this repo's [lint] config, and uv run ruff hits the parent project hatch packaging configuration before linting starts.
• Live Odoo install/update verification still needs to be run against an Odoo 19.0 database.