[EPIC] Streamline wallet & bridge with redesigned teloscan

[rozzaswap]

Since the Teloscan redesign, the wallet is branded quite differently to the block explorer. We should investigate how we can streamline these dapps to look more in line with each other.

• Create 3x streamlined logos for each product (@rozzaswap ask chris waxa)
• Add the teloscan gradient to the wallet vertical bar
• Add the teloscan gradient to the bridge, take inspiration from teloscan
• Bridge add white background to match Wallet/teloscan
• Enable dark mode on wallet, using colours taken from teloscan
• Fix colours in existing dark mode on bridge to match teloscan
• Add light mode to bridge
• Add bridge link to telos wallet menu
• Make external links in telos wallet larger + add logo
• Align fonts and font sizes in bridge with wallet

[rozzaswap]

Discussed with Lee 4th April, priority raised