[x] The navigation bar should have a "Start a new group" link to the left of the user menu button when the current user is logged-in
[x] If the user clicks anywhere on the "Start a new group" link in Section 3 of the landing page or in the navigation bar, they will be navigated to the create group form page with four sections.
[x] The create group form page should have a title of "Start a New Group".
[x] The first section should include: a heading of "Set your group's location", a caption of "Meetup groups meet locally, in person, and online. We'll connect you with people in your area.", and a text input with a placeholder of "City, STATE".
[x] The second section should include: a heading of "What will your group's name be?", a caption of "Choose a name that will give people a clear idea of what the group is about. Feel free to get creative! You can edit this later if you change your mind.", and a text input with a placeholder of "What is your group name?".
[x] The third section should include: a heading of "Describe the purpose of your group.", a caption of "People will see this when we promote your group, but you'll be able to add to it later, too. 1. What's the purpose of the group? 2. Who should join? 3. What will you do at your events?", and a text area with a placeholder of "Please write at least 30 characters".
[x] The fourth section should include: a select input with a label of "Is this an in-person or online group?" and options of "In Person" and "Online", a select input with a label of "Is this group private or public?" and options of "Private" and "Public", and a text input with a label of "Please add an image URL for your group below:" and a placeholder of "Image Url".
[x] The submit button should have the text of "Create Group
[x] Validation messages must show at the top of the form or under each field with an error if the user tries to submit an incomplete form. Examples: a Required Field: " is required" (e.g. "Name is required", etc.), a Description Min Length: "Description needs 30 or more characters".
[x] When a group is successfully created, the user should automatically be navigated to the new group's detail page.
[x] Navigating away and back to the create group form form resets any errors and clears all data entered, so it displays in the default state (no errors, empty inputs, button disabled).