feat: update home page with initiative links, add back button to individual submission page

[wilwong89]

Description

Remove placeholder Vue links
Directly display initiatives selection on the homepage, with greyed out button when not logged in.
Added back button to individual submissions to go back to submissions list page

Files changed:
Navbar.vue
HomeView.vue
SubmissionVue.vue

Types of changes

Checklist

• I have read the CONTRIBUTING doc
• I have checked that unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[github-actions]

Coverage Report (Application)

Totals
Statements:	43.57% ( 61 / 140 )
Methods:	26.32% ( 5 / 19 )
Lines:	60.76% ( 48 / 79 )
Branches:	19.05% ( 8 / 42 )

[github-actions]

Coverage Report (Frontend)

Totals
Statements:	36.82% ( 211 / 573 )
Methods:	35.14% ( 39 / 111 )
Lines:	42.59% ( 135 / 317 )
Branches:	25.52% ( 37 / 145 )

[kyle1morel]

I would double check with Tyler about the UI for the home view. The ticket calls for the initiative text and button to be centered, but I think that may look odd.

[tpantella]

Please center "Choose an Initiative" and have the button centered - for now this change will be visually pleasing and appropriate, though as the content grows we may want to reconsider left alignment in the future. Please use the original text specified in the JIRA ticket "Welcome to the PermitConnect Applications" but with no punctuation (no ellipses, no !, no ). - this will match some of the standards set for page titling and the standard we set with BCBox's homepage.

Otherwise looks good.

[codeclimate]

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