Bootstrap 5 improvements

[Aniket-Engg]

Improvements required from #6134

• Update Light theme colors as per discussion
• Heading in Plugin Manager need fixing

• Cards in Plugin Manager need to be fixed

• The color of our modals doesn't match the general Dark theme aesthetic

• Change default font from Lato to Nunito Sans
• Fix remix logo color :

• Primary button label and icon should be --bs-body-bg : #222336

• the currently selected tab should appear highlighted, same color as the code editor background

• Tooltip backgorund should be --bs-body-bg : #222336
• Dropdown border color should be --bs-border-color: #3f4455
• in the script confirguration panel, we lost the different layers colors

• The template panel cards doesn't follow the right border style

• The submenu alignment for the workspaces dropdown is off

[Aniket-Engg]

Plugin manager is getting revamped through #6224

[joeizang]

• The border above the terminal is the wrong type of gray.
• Text in the template explorer in not the correct size. See the Image below:
  This is on live

Just for comparison, here is the current image with BS 5:

• There should be some margins at the top and bottom of the search of the terminal. See Image:

• Some elements in template explorer are completely misaligned. See image:

• Text of our buttons are of different colors which isn't right. See image:

• I am not sure about the dark text on a light button as it isn't consistent with our button text in the ide.