Add ThermoPro TP-211B test samples (#491)

5 signal captures from two different sensors at 915 MHz, with
JSON reference output. See merbanan/rtl_433#3435.

Co-authored-by: Ali Rahimi <ali@leavemeout.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

tests/thermopro-211b/01/g002_915.1M_1000k.cu8

@@ -0,0 +1 @@
+{"time" : "@0.074057s", "model" : "ThermoPro-TP211B", "id" : 6874, "temperature_C" : 28.500, "mic" : "CHECKSUM"}

tests/thermopro-211b/01/g002_915.1M_1000k.json

@@ -0,0 +1 @@
+{"time" : "@0.074016s", "model" : "ThermoPro-TP211B", "id" : 75507, "temperature_C" : 21.200, "mic" : "CHECKSUM"}

tests/thermopro-211b/01/g074_915.1M_1000k_21.2degC.cu8

@@ -0,0 +1 @@
+{"time" : "@0.074021s", "model" : "ThermoPro-TP211B", "id" : 75507, "temperature_C" : 22.000, "mic" : "CHECKSUM"}

tests/thermopro-211b/01/g074_915.1M_1000k_21.2degC.json

@@ -0,0 +1 @@
+{"time" : "@0.074021s", "model" : "ThermoPro-TP211B", "id" : 75507, "temperature_C" : 22.900, "mic" : "CHECKSUM"}

tests/thermopro-211b/01/g097_915.1M_1000k_22.0degC.cu8

@@ -0,0 +1 @@
+{"time" : "@0.074025s", "model" : "ThermoPro-TP211B", "id" : 75507, "temperature_C" : 23.000, "mic" : "CHECKSUM"}