readability improvements and diff formatting

CSS Styling Adjustments (`custom.css`)

Updated @font-face for NotoSans-Mono to support variable font properties.
Increased font weight in pre tags to 490 from 400
Improved legibility of sidebar in dark mode.

Font File Management

Removed all static variations of "NotoSansMono" font files and replaced with a single variable font.

Code Theme Enhancements in `ir-code` Themes (`dark.ts` and `light.ts`)

Fine-tuned the syntax highlighting theme in both light and dark modes to improve code legibility
Separated and improved formatting for diff blocks

Before and Afters

TSX

Light Mode

Before: Button-Light-Before

After: Button-Light-After

Dark Mode

Before: Button-Dark-before

After: Button-Dark-After

Diff

Light Mode

Before: Diff-Light-Before

After: Diff-Light-After

Dark Mode

Before: Diff-Dark-Before

After: Diff-Dark-After

Sidebar

Before: Sidebar Dark Before

After: Sidebar-Dark-After

infinitered / ir-docs

readability improvements and diff formatting #44

CSS Styling Adjustments (`custom.css`)

Font File Management

Code Theme Enhancements in `ir-code` Themes (`dark.ts` and `light.ts`)

Before and Afters

TSX

Light Mode

Dark Mode

Diff

Light Mode

Dark Mode

Sidebar

infinitered / ir-docs

readability improvements and diff formatting #44

CSS Styling Adjustments (custom.css)

Font File Management

Code Theme Enhancements in ir-code Themes (dark.ts and light.ts)

Before and Afters

TSX

Light Mode

Dark Mode

Diff

Light Mode

Dark Mode

Sidebar

CSS Styling Adjustments (`custom.css`)

Code Theme Enhancements in `ir-code` Themes (`dark.ts` and `light.ts`)