feat: revamp BOS component Dashboard Nav, BOS component explorer, introduce launchpad prototype, and added 404 fallback.

[Kevin101Zhang]

added BOS component launchpad, and a general 404 fallback.
revamped and integrated launchpad with new navigation with style reword for better alignment towards future styles

https://www.loom.com/share/bc9ed95387e5451f94fac65eac2bb146?sid=a3763829-bc5c-4c67-af06-9433762570f5

[Kevin101Zhang]

Difficult make make in multiple PRs unfortunately with the nature of the PR. Many overlapping files and the transition from BOS state management of (State.init {xyz:1} and state.xyz) to more traditional supported react state
const [xyz, setXyz] = useState(1)

[darunrs]

The launchpad looks nice! Good place to start for sure. I'll drop any suggestions I have in the slack channel. That said, the Loom did not show it so I wanted to confirm that the initial page is still Explore Indexers and not the launchpad. We should only switch to the Launchpad when it's complete. On that note, can you set a flag to not display the launchpad unless the env is dev? We should feature flag it for now until it's actually functional.