TP-04 — Add Querya theme color parser wrapper

[ZhuchkaTriplesix]

Epic: A
Depends on: TP-03

Source: docs/theme-parser-github-issues.md

Goal

Support Querya custom HEX formats without duplicating incompatible color parsing logic.

Files

• lib/core/theme/parser/color_parser.dart
• test/core/theme/parser/color_parser_test.dart

Implementation

Add:

Color parseQueryaThemeColor(String raw)

Behavior:

• trim whitespace;
• accept #RRGGBB;
• accept RRGGBB;
• accept #AARRGGBB;
• accept AARRGGBB;
• delegate to parseVsCodeColor where possible;
• throw FormatException for invalid input.

If current parseVsCodeColor already supports all formats, implement this wrapper as normalization + delegate.

Acceptance Criteria

• Wrapper exists and is used by custom theme factory.
• No second unrelated parser implementation.
• Error messages mention the invalid value.

Tests

Cases:

• #1E1E1E
• 1E1E1E
• #FF1E1E1E
• FF1E1E1E
• lowercase hex
• invalid length
• invalid characters
• empty string

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