chore: Update README for Installation, Usage and Development

[kienvo]

This will close #51

Summary by Sourcery

Update the README to include comprehensive instructions for installation, usage, and development, enhancing the documentation for users and developers.

Documentation:

• Add detailed installation instructions for setting up the firmware, including prerequisites and flashing steps.
• Include usage guidelines for transferring bitmaps over BLE, USB HID, and USB CDC ACM, and reading firmware version from the badge.
• Provide development instructions covering tools, build process, debugging methods, and adding new BLE profiles and USB composite devices.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request updates the README.md file to include comprehensive information on installation, usage, and development of the BadgeMagic firmware. It adds detailed instructions for flashing the firmware, using the badge over BLE and USB, reading firmware versions, and provides guidance for developers on building, debugging, and extending the firmware functionality.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Added installation instructions	Included steps to install wchisp Provided instructions for downloading prebuilt binaries Explained how to enter bootloader mode Added command to flash the firmware	README.md
Expanded usage documentation	Added information on transferring bitmaps over BLE Described USB HID data transfer method Explained USB CDC ACM data transfer method Provided instructions for reading firmware version via BLE, USB, and screen	README.md
Added development setup and instructions	Listed required development tools Provided build instructions for different badge versions Explained how to flash the firmware during development Added debugging instructions for UART and USB CDC-ACM	README.md
Included guidance for extending firmware functionality	Explained how to add a new BLE profile Provided instructions for adding a new USB Composite Device	README.md

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[sourcery-ai]

Hey @kienvo - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟡 Documentation: 2 issues found

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