[.NET] Removed dependency on System.Text.Json for improved startup time

[obligaron]

🤔 What's changed?

This PR replaces reading reading gherkin-languages.json on runtime with a precompiled step (roslyn source generator). This reduces the runtime overhead for startup/coldstart and removes dependencies (and with them jit time).

Results before:

Method	Runtime	FeatureFile	Mean	Error	StdDev	Gen0	Gen1	Gen2	Allocated
Parser	.NET 8.0	tags.feature	410.61 μs	8.183 μs	10.349 μs	35.1563	35.1563	35.1563	490.98 KB
ParserReuse	.NET 8.0	tags.feature	15.34 μs	0.182 μs	0.162 μs	2.5177	0.0916	-	41.18 KB
Parser	.NET Framework 4.8.1	tags.feature	876.67 μs	15.740 μs	14.724 μs	71.2891	35.1563	35.1563	512.97 KB
ParserReuse	.NET Framework 4.8.1	tags.feature	23.80 μs	0.108 μs	0.084 μs	7.3853	0.2747	-	45.45 KB
Parser	.NET 8.0	very_long.feature	989.34 μs	7.098 μs	6.292 μs	140.6250	70.3125	35.1563	2012.58 KB
ParserReuse	.NET 8.0	very_long.feature	565.29 μs	5.020 μs	4.695 μs	94.7266	47.8516	-	1558.77 KB
Parser	.NET Framework 4.8.1	very_long.feature	1,901.60 μs	11.795 μs	10.456 μs	320.3125	142.5781	35.1563	2071.23 KB
ParserReuse	.NET Framework 4.8.1	very_long.feature	905.75 μs	2.283 μs	1.906 μs	259.7656	100.5859	-	1596.55 KB

Results after:

Method	Runtime	FeatureFile	Mean	Error	StdDev	Gen0	Gen1	Allocated
Parser	.NET 8.0	tags.feature	23.01 μs	0.440 μs	0.556 μs	2.9297	0.1221	49.04 KB
ParserReuse	.NET 8.0	tags.feature	15.49 μs	0.215 μs	0.201 μs	2.5024	0.0916	41.18 KB
Parser	.NET Framework 4.8.1	tags.feature	31.99 μs	0.613 μs	0.656 μs	9.2773	0.4272	57.32 KB
ParserReuse	.NET Framework 4.8.1	tags.feature	23.45 μs	0.105 μs	0.088 μs	7.3853	0.2747	45.45 KB
Parser	.NET 8.0	very_long.feature	565.50 μs	5.492 μs	5.138 μs	95.7031	54.6875	1568.74 KB
ParserReuse	.NET 8.0	very_long.feature	546.43 μs	10.785 μs	10.088 μs	94.7266	47.8516	1558.77 KB
Parser	.NET Framework 4.8.1	very_long.feature	931.86 μs	5.545 μs	5.187 μs	261.7188	96.6797	1610.54 KB
ParserReuse	.NET Framework 4.8.1	very_long.feature	896.85 μs	2.761 μs	2.447 μs	259.7656	100.5859	1596.55 KB

Bonus Comparions with RunStrategy.ColdStart

Note: RunStrategy.ColdStart is not very stable, so take this with a little salt.

Results before:

Method	Runtime	FeatureFile	Mean	Error	StdDev	Median	Allocated
Parser	.NET 8.0	tags.feature	1,560.7 μs	1,093.0 μs	3,222.6 μs	1,211.90 μs	508.6 KB
ParserReuse	.NET 8.0	tags.feature	434.4 μs	1,113.6 μs	3,283.5 μs	103.95 μs	41.9 KB
Parser	.NET Framework 4.8.1	tags.feature	1,825.7 μs	2,641.5 μs	7,788.6 μs	1,026.30 μs	533.16 KB
ParserReuse	.NET Framework 4.8.1	tags.feature	700.4 μs	2,219.5 μs	6,544.3 μs	45.35 μs	48 KB
Parser	.NET 8.0	very_long.feature	4,129.8 μs	1,017.0 μs	2,998.7 μs	3,820.30 μs	2028.3 KB
ParserReuse	.NET 8.0	very_long.feature	2,767.4 μs	1,072.6 μs	3,162.7 μs	2,268.20 μs	1559.48 KB
Parser	.NET Framework 4.8.1	very_long.feature	2,317.5 μs	1,800.2 μs	5,308.1 μs	1,753.50 μs	2085.16 KB
ParserReuse	.NET Framework 4.8.1	very_long.feature	1,339.9 μs	1,793.1 μs	5,287.0 μs	777.25 μs	1600 KB

Results after:

Method	Runtime	FeatureFile	Mean	Error	StdDev	Median	Allocated
Parser	.NET 8.0	tags.feature	315.1 μs	599.9 μs	1,768.9 μs	142.60 μs	49.76 KB
ParserReuse	.NET 8.0	tags.feature	279.9 μs	586.4 μs	1,729.1 μs	102.45 μs	41.9 KB
Parser	.NET Framework 4.8.1	tags.feature	430.8 μs	1,263.7 μs	3,726.0 μs	57.60 μs	64 KB
ParserReuse	.NET Framework 4.8.1	tags.feature	419.8 μs	1,270.1 μs	3,744.8 μs	43.55 μs	48 KB
Parser	.NET 8.0	very_long.feature	2,703.4 μs	527.6 μs	1,555.5 μs	2,572.95 μs	1569.45 KB
ParserReuse	.NET 8.0	very_long.feature	2,487.9 μs	526.4 μs	1,552.1 μs	2,180.60 μs	1559.48 KB
Parser	.NET Framework 4.8.1	very_long.feature	1,190.0 μs	1,037.8 μs	3,060.0 μs	832.15 μs	1616 KB
ParserReuse	.NET Framework 4.8.1	very_long.feature	1,141.2 μs	1,137.8 μs	3,354.9 μs	783.45 μs	1601.52 KB

⚡️ What's your motivation?

Speedup startup time when gherkin parser is used in visual studio plugin or or while compiling.
Also reducing the public needed dependencies of the project, so hopefully less needed (security) updates.

🏷️ What kind of change is this?

• 🏦 Refactoring/debt/DX (improvement to code design, tooling, etc. without changing behaviour)
• 💥 Breaking change (incompatible changes to the API)

♻️ Anything particular you want feedback on?

gherkin-languages.json is referenced directly and doesn't get copied in the makefile. I thought this is clearer and avoid duplicate files in the repro, but I'm not 100% sure if there are other reasons for it.

📋 Checklist:

• I agree to respect and uphold the Cucumber Community Code of Conduct
• Users should know about my change
  • I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

[gasparnagy]

These are great improvements of the performance. I'm fine with it.