[FEATURE] Graph colors settings default, contrast, scheme, preview, bulk, picker

[chepo92]

1. Background

• Default colors don't have much contrast, and in some cases there are no sufficient colors.
• Color setting is done by item (example, no bulk action)
• No color guide or preview

2. Proposed Solution

• Use default high contrast colors
• Let user select between different predefined color schemes
• Allow bulk edit colors (not by-item), example if you want to replace some all colors, you need to edit each item one by one, a list or big text field would be an option.
• Would be nice if line color preview is showed
• Also a color picker palette

3. Affected Area

Check all that apply.

• Commit graph (Graph View)
• Commit details panel (Bottom Panel)
• Sidebar (Branches / Remotes / Tags / Stashes / Worktrees)
• Toolbar (Fetch / Pull / Push / Refresh)
• Context menu
• Search
• Statistics view (Stats)
• Activity Log
• i18n (localization)
• Git operations (new Git command support)
• Other

4. Alternatives or References

none

5. Additional Context (optional)

none