Feat: Implemented project based categorization of updates

[maanasb01]

This PR solves issue #172

Added project-based categorization of updates.

Followed a similar approach to get updated tags and make tag pages as did for the blogs (pull request https://github.com/tattle-made/website/pull/164 ).

• Created project tag pages in gatsby-node file for every tag
• Created a default-updates-project-tag-page for the project tag page of updates. (used in gatsby-node).
• Inside updates.jsx, made a separate component UpdatesIndex to render all the updates. This is being also used in the UpdatesTagPage.
• Created useUpdateTags to fetch all the tags related to updates.
• If an update (mdx file) has a project field then its tag would be added to that update's tags as well.
• Changed the old useTags hook to useBlogTags to identify the hooks better for updates and blogs.

Please NOTE: It is implemented in such a way that categorizing based on general tags and their respective pages can be implemented later if required.

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