Add support for SEQURE S99, and new Rev. of S60P

[jonasius]

• Please check if the PR fulfills these requirements

• [x] The changes have been tested locally
• [ ] There are no breaking changes

• What kind of change does this PR introduce?

• Add support for Sequre S99

• What is the new behavior (if this is a feature change)? IronOS booting on Sequre S99

• Other information: Currently work in progress.

Problems / Todo

• [x] Startup is slow, black screen for a few seconds, maybe due to PD negotiation issues?
• [x] Negotiation of PD seems to have a problem. Tested with multiple Apple USB-C Chargers.Always uses 5V QC. PD Debug at startup shows State 0 0 21 multiple times, with blinking/resetting screen, after a while showing State 4 1 21.
• [x] OP_AMP_GAIN_STAGE 536 needs to be adjusted according to the 22k resistor instead of 51k
• [x] Documentation needs to be updated
• [x] Maybe source/Code/BSP/Sequre_S60 folder should be renamed to Sequre?
• [x] Better thermo model for tip temperature measurement?
• [ ] Tip selection option to allow usage of 5.5 Ohm tips?