Update the node-runner's private node management page colours and skin tones (Dark mode)

[brunomenezes]

📄 Context

Here are the node-runners private node management page changes on colour, skin tones and fonts in Dark mode to comply with the new Cartesi brand. The application's structure did not change, only the look and feel.

PS: Refer to the parent of this issue for references.
PS²: Don't worry about the header and footer, because that is addressed in a separate issue #62

📈 Subtasks

Overall

• Make sure the fonts are applied correctly based on the Figma description. i.e. Where to use each font and what size and weight to be applied.
• Make sure the components are round, like the design. We're transitioning from a squared-based design to a round one.

Page sessions

• For the page header area:
  • Apply the new colours and/or font changes to the backlink.
  • apply new colour and font rules for the page title
• For the CTSI area:
  • Apply the new colours and font rules to the Wallet Balance block, including Tooltip.
  • Apply the new colours and font rules to the Allowance block, including Tooltip and action button.
  • Apply the new colours and font rules to the Set Allowance modal content, including its feedback UI.
• Apply design changes to the stake instruction/disclaimer. PS: You may need to clear your localStorage to see it.
• For the Pool Node area when the node is hired:
  • Apply new colour and font rules to the node information card.
  • Check/Apply new colour and font rules to the action buttons, i.e. RETIRE & AUTHORIZE.
  • Apply new design changes to the tooltip.
  • Apply new colours and font rules to the Node balance modal.
  • Apply new colours and font rules to the Retire node modal.
  • Check/Apply new support system colours to feedback UI. e.g. transaction feedback, warn/info/error messages.
• For the Pool Node area when the node is not hired:
  • Apply new colour and font rules to the node hiring Form.
  • Check/Apply new support system colours to feedback UI. e.g. transaction feedback, input error messages
• For the Node history area:
  • Apply new colour and font rules to the node historical Table.
• For the overall Staking area
  • Apply support system colours for any notification/warning message.
  • Apply new colours and fonts to the action buttons .i.e. Unstake & Stake.
  • Apply new colours and fonts for the Maturing card, including any transitional state, e.g. Timers, etc.
  • Apply new colours and fonts for the Your Staked Balance card, including any transitional state, e.g. Timers, etc.
  • Apply new colours and fonts for the Released card. PS: To see the WITHDRAW action link, you need unstacked CTSI
• Apply the support colour system for the TransactionBanner blocks (Redundancy check).
  • Allowance action.
  • Node Eth Deposit action.
  • Node Retirement action.
  • Node Authorization action.
  • Node Hiring action.
  • Stake action.
  • Unstake action.
  • Withdrawal action.
• Apply the colours changes to the following modals (Redundancy check):
  • Allowance Modal
  • Node Balance modal
  • Node Retire modal
  • Stake Modal
  • Unstake Modal
• Add here any extra tasks you see fit [Optional]

🎯 Definition of Done

• Node-runners staking pool management page matches the design specs on Figma.