Implement toolchain harvesting for cpp #46

Performance Gate Passed

⚡ 5 improved benchmarks
✅ 455 untouched benchmarks

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
⚡	WallTime	`BM_RLE_Decode[10000]`	24.7 µs	22.1 µs	+11.99%
⚡	WallTime	`BM_RLE_Decode[1000]`	2.9 µs	2.6 µs	+10.01%
⚡	WallTime	`BM_RLE_Decode[100000]`	309.2 µs	279 µs	+10.81%
⚡	WallTime	`BM_Template[std\:\:string]`	74.1 ns	67.3 ns	+10.07%
⚡	Simulation	`BM_memcpy[64]`	301.9 ns	272.8 ns	+10.69%

_{Comparing main (af89417) with main (d6b4111)}