Honor endianess on group level

[jreineckearm]

Description

The Memory Inspector internals do already have provisions to consider endianess in the display:

vscode-memory-inspector/src/webview/components/memory-widget.tsx

Line 43 in d1400a1

endianness: Endianness;

However, the corresponding property isn't honored yet for rendering. It should be on word group level of the display. At the moment, words groups appear to be displayed as big endian while the internal default is little endian.
UPDATE (06/03/24): After further discussion between @martin-fleck-at and @jreineckearm , we agreed to change the scope for applying the endianess from word to group. The rational behind this was:

• The display contents is formatted to introduce spaces between groups, not words. Applying endianess on a word level would have been confusing because it would be hard to see when a new word starts. It is better to show groups in a consistent endianess scheme. To replicate a word endianess, the user can configure the display to use 1 word group.
• This way the user would have the ability to control on which granularity the endianess transformation happens. This can be interesting if for example working with memory-mapped buffers for a peripherals where the consumed endianess differs from the CPU word endianess.

How to reproduce:

• Start a debug session and open a memory window for a variable with a type > 1 Byte. For example with Arm Debugger and an M-class CPU. Most implementations are little endian.
• Make sure the word setting matches the type's size. And words per group is set to 1.
• Compare the hex value in the variables window and the displayed word in the Memory Inspector. Cheating a little below as the variable is shown in decimal representation: 25000000 (decimal) = 0x017D7840

• An additional test is to look at larger group setting and toggle between little and big endianess to verify the byte-order is correctly swapped.

Expected behavior

Expectation is that endianess is honored on word group level.

Environment

• OS: Windows 10 Enterprise
• Browser: N/A
• Theia or VS Code Version: VS Code 1.86.2

Additional information