feat(datasource/custom): allow to fetch from TOML data endpoint

[secustor]

Describe the proposed change(s).

Similar to the current json implementation this new toml option should query an http endpoint tough instead toml-eslint-parser should be used as parser

Notes:

• the request should send the Accept header with application/toml as value
• After parsing as toml, jsonata rules should be applied

[viceice]

we recently switched the toml parser

[secustor]

Is there a tracking issue for the migration? I see that we still have usages of that package.

[rarkins]

Are you sure? I don't see it anywhere including package.json

[viceice]

• fix: Use toml-eslint-parser instead of @iarna/toml #25594