Correct and rename types around bit states

[datenreisender]

In b2352a7 some wrong types are corrected.

After that several things are renamed and documentation is adjusted. Hoping this makes it more clear when we look at this code again. :-)

[Copilot]

Pull Request Overview

This PR refactors type names and documentation related to bit state handling to improve code clarity. The changes correct type usage where BitState (a 2-bit value) was confused with ChartLineValue (rendering coordinates), and renames functions and variables for better semantic meaning.

Key changes:

• Renamed BitStateType enum to ChartLineValue and replaced BitStateIndexType with a new BitState type alias
• Renamed averagedBitState() to getSingleBitState() and updated its documentation with clearer examples
• Renamed variables for clarity (e.g., accumulator → accumulatedBitStates, stateToIndex → chartLineToBitState)

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/utils/bitConversion.ts	Updates function/variable names and documentation; changes type references from BitStateType/BitStateIndexType to ChartLineValue/BitState
src/components/Chart/data/dataTypes.ts	Replaces BitStateIndexType type and BitStateType enum with BitState type and ChartLineValue enum; removes unused type guard function
src/components/Chart/data/dataAccumulator.ts	Updates type imports and renames stateToIndex function to chartLineToBitState
src/components/Chart/data/bitDataStorage.ts	Updates type references from BitStateType to BitState in interface definitions
src/components/Chart/data/bitDataSelector.ts	Renames function call from averagedBitState to getSingleBitState
src/components/Chart/data/bitDataAccumulator.ts	Renames accumulator to accumulatedBitStates and updates type/function references
src/actions/exportChartAction.ts	Renames function call from averagedBitState to getSingleBitState

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