[Docs] Dev guide to transpilation

[RobinL]

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[github-actions]

Test: test_2_rounds_1k_duckdb

Percentage change: -46.4%

	date	time	stats_mean	stats_min	commit_info_branch	commit_info_id	machine_info_cpu_brand_raw	machine_info_cpu_hz_actual_friendly	commit_hash
849	2022-07-12	18:40:05	1.89098	1.87463	splink3	c334bb9	Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	2.7934 GHz	c334bb9
972	2022-08-14	14:16:22	1.02769	1.00449	transpilation_guide	3db9a40	Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz	2.5939 GHz	3db9a40

Test: test_2_rounds_1k_sqlite

Percentage change: -40.7%

	date	time	stats_mean	stats_min	commit_info_branch	commit_info_id	machine_info_cpu_brand_raw	machine_info_cpu_hz_actual_friendly	commit_hash
851	2022-07-12	18:40:05	4.32179	4.25898	splink3	c334bb9	Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz	2.7934 GHz	c334bb9
974	2022-08-14	14:16:22	2.53015	2.52504	transpilation_guide	3db9a40	Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz	2.5939 GHz	3db9a40

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