Chore: Refactor CreateChannelModal

[dougfabris]

Proposed changes (including videos or screenshots)

Jira Issue: UFR-11

• Replace useForm
• Improve UI validations on Modal
• Add ToastBar message on creating a channel
• Fixes topic field not being added properly

Issue(s)

Steps to test or reproduce

Further comments

[codecov[bot]]

Codecov Report

Merging #27469 (91e4e86) into develop (557708a) will increase coverage by 1.08%. The diff coverage is n/a.

:exclamation: Current head 91e4e86 differs from pull request most recent head f52b7da. Consider uploading reports for the commit f52b7da to get more accurate results

@@             Coverage Diff             @@
##           develop   #27469      +/-   ##
===========================================
+ Coverage    41.13%   42.22%   +1.08%     
===========================================
  Files          846      819      -27     
  Lines        18378    17859     -519     
  Branches      2101     2026      -75     
===========================================
- Hits          7560     7541      -19     
+ Misses       10534    10032     -502     
- Partials       284      286       +2     

Flag	Coverage Δ
e2e	42.22% <ø> (+1.08%)	:arrow_up:

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