Update to UI and Framework Icons (#9468)

This is an update to 82 Zed UI and file_icons to improve icon legibility
and align contributed file_icons to the general icon system styling.
From review it appears they're 2px larger in width and height but gpui
render scaling is at play. The original icons were designed at 14x14 to
be viewed at that size, but the ui_font_size now controls this so
they've been updated to the default of 16x16 for optimum fidelity.

![CleanShot 2024-03-17 at 16 20
13@2x](https://github.com/zed-industries/zed/assets/1648941/4151c631-78e6-43a8-914f-37b00f43e130)

Release Notes:

- Updated various UI and file icons for consistency.

assets/icons/file_icons/book.svg

@@ -1,6 +1,6 @@
-<svg width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path d="M12 10L12 10.8374C12 10.9431 11.9665 11.046 11.9044 11.1315L11.1498 12.1691C11.0557 12.2985 10.9054 12.375 10.7454 12.375L3.25461 12.375C3.09464 12.375 2.94433 12.2985 2.85024 12.1691L2.09563 11.1315C2.03348 11.046 2 10.9431 2 10.8374L2 2" stroke="black" stroke-width="1.25" stroke-linecap="round"/>
-<path d="M2 12V10L7 11H12V12H2Z" fill="black"/>
-<path d="M5.63246 2.04415C6.44914 2.31638 7 3.08066 7 3.94152V10.7306C7 11.0924 6.62757 11.3345 6.29693 11.1875L2.79693 9.63197C2.61637 9.55172 2.5 9.37266 2.5 9.17506V1.69371C2.5 1.35243 2.83435 1.11145 3.15811 1.21937L5.63246 2.04415Z" stroke="black" stroke-width="1.25" stroke-linecap="round" stroke-linejoin="round"/>
-<path d="M8.5 2C7.67157 2 7 2.67157 7 3.5V12C7 11.1954 10.2366 11.0382 11.5017 11.0075C11.7778 11.0008 12 10.7761 12 10.5V2.5C12 2.22386 11.7761 2 11.5 2H8.5Z" stroke="black" stroke-width="1.25" stroke-linecap="round" stroke-linejoin="round"/>
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M13 11V11.8374C13 11.9431 12.9665 12.046 12.9044 12.1315L12.1498 13.1691C12.0557 13.2985 11.9054 13.375 11.7454 13.375H4.25461C4.09464 13.375 3.94433 13.2985 3.85024 13.1691L3.09563 12.1315C3.03348 12.046 3 11.9431 3 11.8374V3" stroke="black" stroke-width="1.5" stroke-linecap="round"/>
+<path d="M3 13V11L8 12H13V13H3Z" fill="black"/>
+<path d="M6.63246 3.04418C7.44914 3.31641 8 4.08069 8 4.94155V11.7306C8 12.0924 7.62757 12.3345 7.29693 12.1875L3.79693 10.632C3.61637 10.5518 3.5 10.3727 3.5 10.1751V2.69374C3.5 2.35246 3.83435 2.11148 4.15811 2.2194L6.63246 3.04418Z" stroke="black" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M9.5 3C8.67157 3 8 3.67157 8 4.5V13C8 12.1954 11.2366 12.0382 12.5017 12.0075C12.7778 12.0008 13 11.7761 13 11.5V3.5C13 3.22386 12.7761 3 12.5 3H9.5Z" stroke="black" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
 </svg>