New version of Development Strategy

[GabriellaLohy]

This is the new development strategy that I made using Samir template.
Inside this PR you can see this changes:

1. Whole brand new version of development strategy
2. Added wireframe picture named wireframe.jpg
3. Added User Story Dependency diagram
4. Organized assets folder

General Checks

• the branch is up to date with main/master
• the code works when pulled and run locally
• All CI checks pass
• all conflicts are resolved (if any)
• PR has a descriptive title
• PR has appropriate labels and milestones for easy identification
• PR it is assigned to the owner
• reviewers are assigned
• the PR contributes only one focused change
• It is in the appropriate column in the project board (if necessary)
• has short and clear description
• is linked to an issue (if it is related)
• feedback is addressed (if any and if it is appropriate feedback.)

Markdown

• the markdown source is formatted
• spelling and grammar is correct in all text
• The markdown looks correct when you preview the file
• all links and images work

HTML

• pages besides /index.html are stored in /pages
• the code is well-formatted
• the HTML is valid
• there are no inline styles (example: style='color: red;')
• there are no <style> tags with CSS, all styles are hrefs
• there is no inline JavaScript (example: onclick='doSomething()')
• there are no <script> tags with JS, all JS is in an separate file
• ids are used for JavaScript only, not for CSS
• semantic tags are used
• spelling and grammar is correct in all site content

CSS

• the code is well-formatted
• passes all the linting checks