Add CI using bitcoin-maintainer-tools #31

Job	Run time
Test - stable toolchain (minimal)	22s
Docs - stable toolchain (recent)	32s
Integration tests - stable toolchain (26_0)	1m 17s
Test - stable toolchain (recent)	25s
Prepare	3s
Integration tests - stable toolchain (25_2)	1m 24s
Integration tests - stable toolchain (25_1)	1m 27s
Integration tests - stable toolchain (25_0)	1m 4s
Integration tests - stable toolchain (24_2)	50s
Integration tests - stable toolchain (24_1)	1m 43s
Integration tests - stable toolchain (24_0_1)	45s
Integration tests - stable toolchain (23_2)	1m 58s
Integration tests - stable toolchain (23_1)	1m 0s
Integration tests - stable toolchain (22_1)	1m 29s
Integration tests - stable toolchain (22_0)	1m 52s
Integration tests - stable toolchain (0_21_2)	37s
Integration tests - stable toolchain (0_20_2)	52s
Integration tests - stable toolchain (0_19_1)	1m 55s
Integration tests - stable toolchain (0_18_1)	44s
Integration tests - stable toolchain (0_17_2)	37s
Lint - nightly toolchain (recent)	55s
Docs - nightly toolchain (recent)	38s
Test - nightly toolchain (minimal)	30s
Test - nightly toolchain (recent)	35s
	23m 34s

Provide feedback