[FEATURE]: Detect workspace file programming language

[ericvergnaud]

Is there an existing issue for this?

• I have searched the existing issues

Problem statement

Workspace files do not have a default language (see https://docs.databricks.com/api/workspace/workspace/getstatus).
Therefore, when fetching a workspace file, we need to discover the file's programming language

Proposed Solution

Look at the file extension if any. Ultimately, assume the language is implicit based on context (a file imported from a Python file would also be Python)

Additional Context

Sub-ticket of #1202

[nfx]

this is almost a noop - we know the extensions

[ericvergnaud]

This was about workspace files, not local files. Workspace files are out of scope, closing.