Adds library source back and adds SD card library

[Pandabear1125]

Title. Also:

• Makefile is updated to allow rebuilding libraries
• I modified the Teensy's core library's printf function to work regardless of various compiler flags
• Edited FS.h to accommodate the SD library
• Added TimeLib library by paul: https://github.com/PaulStoffregen/Time

[github-actions]

Doxygen warnings output: (if empty, there are no warnings). Please correct any warnings before merging.

[gitguardian]

⚠️ GitGuardian has uncovered 3 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	GitGuardian status	Secret	Commit	Filename
13215969	Triggered	Generic Password	08f9444	teensy4/usb.c	View secret
13215969	Triggered	Generic Password	08f9444	teensy4/usb.c	View secret
13215969	Triggered	Generic Password	08f9444	teensy4/usb.c	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secrets safely. Learn here the best practices.
3. Revoke and rotate these secrets.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

---

^{🦉 GitGuardian detects secrets in your source code to help developers and security teams secure the modern development process. You are seeing this because you or someone else with access to this repository has authorized GitGuardian to scan your pull request.}

[Pandabear1125]

GitGuardian's warning apears to be a false positive. I could not see anything in usb.h that would be a secret. (we also dont use API keys lol). This code comes straight from paul anyway

[Pandabear1125]

I'll be testing this to verify robot stability later today

[StudentKyle]

Changes look good. Hopefully the git guardian doesn't comment on every PR going forward.

[StudentKyle]

test PR on robot

[Pandabear1125]

Tested, works

[StudentKyle]

Marked security issue as false positive because it is a false positive within the teensy lib

[StudentKyle]

Robot moved and hive started and worked