[ERC20 Launchpad] - Endpoint integration for Community information step

[mzparacha]

Link to Issue

Closes: #9208

Description of Changes

Added endpoint integration for Community information step

"How We Fixed It"

N/A

Test Plan

• Enable FLAG_TOKENIZED_COMMUNITY
• Visit /createTokenCommunity
• Open /packages/commonwealth/client/scripts/views/pages/LaunchToken/useCreateCommunity.ts and add your currently logged-in Ethereum wallet address for the setSelectedAddress state - this is only temporary for testing - the actual address selection happens in step 1 of this flow
• Verify the form is prefilled with data constructed from sample token information
• Submit the form and verify that a new token community has been created.

Deployment Plan

N/A

Other Considerations

N/A

[masvelio]

1. 
   I remember we had some error displaying under the input for occupied community names 🤔

[mzparacha]

Re: #9230 (review)

1. Yes, that was removed during the de-coupling of communities config from the app state variable. Basically previously we had all community names in FE so validation was quicker but now we rely on the API to confirm that.

[Israellund]

lgtm