Add `l8w8jwt` component (For JWT generation and parsing) (IEC-70)

[laukik-hase]

Description

• Minimal, OpenSSL-less and super lightweight JWT library written in C
• Added an example based on ECDSA (256-bit key) signing and verification and unit-test

Checklist

• [x] Component contains License
• [x] Component contains README.md
• [x] Component contains idf_component.yml file with url field defined
• [x] Component was added to upload job
• [x] Component was added to build job
• [x] Optional: Component contains unit tests
• [ ] CI passing

[CLAassistant]

All committers have signed the CLA.