Enhanced the overall UI for submission page with guide to submit resources.

[Murdock9803]

Fixes

• Fixes [Feature] Improve the UI of submission page with vocabulary #274 by @Murdock9803
• Fixes [Feature] Add a step-by-step guide for submitting resources #310 by @Murdock9803

Description

The pull request aims at improving the whole UI of submission.html, including the addition of a step by step written guide, keeping in mind the aesthetics of vocabulary.

Technical details

The pull request :-

• adds a new context to the element, named submit-page.
• refactors the whole html code for submission.html with semantic code.
• makes the page responsive, by adding media queries wherever needed.
• adds a step by step written guide including images, for submission of resource for new github users.
• ensures the page meets current CC aesthetics.
• adds documentation for better understanding and maintainability.
• formats the files with prettier code formatter.

Screenshots

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main or master).
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no
  visible errors.

Developer Certificate of Origin

For the purposes of this DCO, "license" is equivalent to "license or public domain dedication," and "open source license" is equivalent to "open content license or public domain dedication."

Developer Certificate of Origin

Developer Certificate of Origin
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Developer's Certificate of Origin 1.1

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(a) The contribution was created in whole or in part by me and I
    have the right to submit it under the open source license
    indicated in the file; or

(b) The contribution is based upon previous work that, to the best
    of my knowledge, is covered under an appropriate open source
    license and I have the right under that license to submit that
    work with modifications, whether created in whole or in part
    by me, under the same open source license (unless I am
    permitted to submit under a different license), as indicated
    in the file; or

(c) The contribution was provided directly to me by some other
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    it.

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    are public and that a record of the contribution (including all
    personal information I submit with it, including my sign-off) is
    maintained indefinitely and may be redistributed consistent with
    this project or the open source license(s) involved.

[Murdock9803]

@possumbilities please have a look at this PR 🙌

[possumbilities]

Looks good! Approved.