update python scripts to python3

cc256x: update CC256xC to v1.4

lwip: add pan_lwip_http_server example to max32630-fthr

new pan_lwip_http_server example

- add lwIP sources commit b3a939417 (after STABLE-2.1.1) as 3rd-party/lwip/core
- add small DHCP server as 3rd-party/lwip/dhcp-server
- add BNEP lwIP adapter that ha

new pan_lwip_http_server example

- add lwIP sources commit b3a939417 (after STABLE-2.1.1) as 3rd-party/lwip/core
- add small DHCP server as 3rd-party/lwip/dhcp-server
- add BNEP lwIP adapter that handles BNEP events and forwards packets between BNEP and lwIP (only tested for NO_SYS == 1)
- add pan_lwip_http_server example that provides lwIP http server on http://192.168.7.1
- example is added to port/libusb

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max32630-fthr: make fw flashing script path independent

max32630-fthr: fix compile for all examples, add todo items

max32630-fthr: create makefile to build / clean all examples

max32630-ftrh: create project folder inside of exxample folder

max32630-fthr: create project folder with Makefile for each example

max32630-fthr: drop CC2564B suffix as the FTHR comes with the CC2564B by defeault