[pbi-fixer] Add add_calc_group_time_intelligence: add a Time Intelligence calc group (YTD, MTD, PY, YoY, ...)

[KornAlexander]

Adds a sempy_labs fixer add_calc_group_time_intelligence() that add a Time Intelligence calc group (YTD, MTD, PY, YoY, ...).

Adds one source file (src/sempy_labs/semantic_model/_Add_CalcGroup_TimeIntelligence.py) plus one re-export line in the matching __init__.py. No other files touched, no shared helpers, no dependency on any other PR.

Part of the PBI Fixer contribution. Tracking issue: #1185

[Copilot]

Pull request overview

This PR adds a new semantic model “fixer” function, add_calc_group_time_intelligence(), intended to create a standard “Time Intelligence” calculation group in the semantic model behind a given Power BI report (or report scan-only), and re-exports it from sempy_labs.semantic_model.

Changes:

• Added add_calc_group_time_intelligence() implementation to create a “Time Intelligence” calculation group (AC/Y-1..Y-3/YTD.. and variance items) using TOM operations.
• Added a corresponding re-export in src/sempy_labs/semantic_model/__init__.py.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
src/sempy_labs/semantic_model/_Add_CalcGroup_TimeIntelligence.py	New fixer that scans for an existing TI calc group, finds the calendar table/date column, and creates a TI calculation group + items.
src/sempy_labs/semantic_model/__init__.py	Re-exports add_calc_group_time_intelligence via import and __all__ update.

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