Instruction lists all f0cal conan objects, not just AI/ML/CV libraries

[JeffreyUrban]

On the README.md, the instruction to view a "list of the AI/ML/CV libraries that f0cal provides tracepoints for" shows all f0cal conan objects, not just AI/ML/CV libraries. As the device farm expands this list will continue to include more non-library objects.

Command:
conan search -r f0cal

Output:

Existing package recipes:

append_raspi3b+_ubuntu_server/19.10@f0cal/device-farm
babeltrace/1.53@f0cal/testing
babeltrace/2.0-alpha@f0cal/testing
dtb_bcm2837_raspi3b+_ubuntu_server/19.10@f0cal/device-farm
dtb_bcm2837_raspi3b_ubuntu_server/18.04.3@f0cal/device-farm
f0cal-opencv/4.0.1@f0cal/testing
image_raspi3b+_ubuntu_server_arm64/18.04.3@f0cal/device-farm
image_raspi3b+_ubuntu_server_arm64/19.10@f0cal/device-farm
initrd_raspi3b+_ubuntu_server/18.04.3@f0cal/device-farm
initrd_raspi3b+_ubuntu_server/19.10@f0cal/device-farm
invisible_demo/0.1@f0cal/testing
kernel_raspi3b+_ubuntu_server/19.10@f0cal/device-farm
lttng-modules/2.10@f0cal/testing
lttng-suite/2.10@f0cal/testing
lttng-tools/2.10@f0cal/testing
lttng-ust/2.10@f0cal/testing
opencv/4.0.1@f0cal/testing
pxelinux.0/6.03@f0cal/device-farm
red_eye_demo/0.1@f0cal/testing
sysbench/1.0@f0cal/testing

Suggested changes:

• (Quick fix) Filter on channel by using: conan search -r f0cal | grep @f0cal/testing
• (Long-term fix) Add conan searchable naming convention for libraries, or split libraries and device-farm objects into two separate repos.