fix: vote credits input bug

[kittybest]

Description

• we only allow user to input a number smaller than the initialVoiceCredits in the ballot input field, however
  1. if the user not registered, he/she can still go to the ballot page or add votes on project page, but actually the initialVoiceCredits is 0 due to they not signed up yet, so the input field works weird
  2. even if the user registered, the input field limitation is not applied to the add votes field on project page

so in this PR, we do

• prevent user from going to ballot page if not during the voting period
• prevent user from going to ballot page if not registered
• prevent user enter a vote amount larger than the initialVoiceCredits on the projects page
• add styling to the input field if the amount exceeds, instead of not allow user to input
• prevent user submit ballot if exceeds the initialVoiceCredits

Related Issues
close #223, #185

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Name	Status	Preview	Comments	Updated (UTC)
maci-rpgf	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 22, 2024 6:27pm

[ctrlc03]

Thanks

[0xmad]

@kittybest thanks!