Add volunteer select availability table

[MatoPlus]

Ticket link

Closes #120, #119, #129

Implementation description

• Add volunteer select availability table
• Enhanced base components for better padding, highlighted background on select, disabled input when not selected

TODO:

• change prop type from postingId to posting type (@uwblueprint/sistering-w22-pls I'm not sure what type I should use here). This can honestly be done in the integration step

Steps to test

1. Play around with the test page on the volunteer/posting route
2. input should be disabled if shift checkbox is not selected
3. background should highlight when shift selected
4. page should display current week from sun to sat correctly with appropriate shifts in each table section

What should reviewers focus on?

• Design: look and feel
• Dev: Implementation of table

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

[github-actions]

Visit the preview URL for this PR (updated for commit b1b95ea):

https://sistering-dev--pr200-rickson-volunteer-se-gye7lbg5.web.app

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