MC's goto dialog supports Line/Percent/Decimal offset/Hex offset
modes. TLC's goto prompt previously only accepted line numbers.
Parse the goto prompt input for multi-format support:
- '50%' → goto 50% of the file (goto_percent)
- '0x400' → goto byte offset 1024 (goto_offset, hex)
- Number > line_count → treat as byte offset (goto_offset)
- Number ≤ line_count → treat as line number (goto_line)
Also updated the prompt label to 'Goto (line/50%/0x):' so the
new formats are discoverable.
Added 1 unit test verifying 50% goto lands near line 50 in a
100-line file.
Tests: 1421 pass (was 1420), zero warnings.
vasilito
11a7abcc8d