✨⚗️ [RUM-4469] introduce a plugin system

[BenoitZugmeyer]

Motivation

Experiment with a plugin system to provide custom integrations.

This is experimental: the plugin interface might change in any version, be warned!

Changes

Testing

• [x] Local
• [ ] Staging
• [x] Unit
• [ ] End to end

---

I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.75000% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.66%. Comparing base (9b21a36) to head (5c5e461). Report is 1 commits behind head on main.

Files	Patch %	Lines
packages/rum-core/src/domain/plugins.ts	85.71%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2809 +/- ## ========================================== - Coverage 93.66% 93.66% -0.01% ========================================== Files 244 245 +1 Lines 7168 7181 +13 Branches 1605 1611 +6 ========================================== + Hits 6714 6726 +12 - Misses 454 455 +1 ```

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[cit-pr-commenter[bot]]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	160.07 KiB	160.44 KiB	379 B	+0.23%	✅
Logs	58.07 KiB	58.09 KiB	20 B	+0.03%	✅
Rum Slim	108.65 KiB	109.02 KiB	379 B	+0.34%	✅
Worker	25.21 KiB	25.21 KiB	0 B	0.00%	✅

🚀 CPU Performance

| Action Name | Base Average Cpu Time (ms) | Local Average Cpu Time (ms) | 𝚫 | | --- | --- | --- | --- | | addglobalcontext | 0.002 | 0.002 | 0.000 | | addaction | 0.035 | 0.038 | 0.002 | | adderror | 0.038 | 0.033 | -0.006 | | addtiming | 0.001 | 0.001 | -0.000 | | startview | 1.354 | 1.069 | -0.285 | | startstopsessionreplayrecording | 0.989 | 1.106 | 0.117 | | logmessage | 0.020 | 0.023 | 0.003 |

🧠 Memory Performance

| Action Name | Base Consumption Memory (bytes) | Local Consumption Memory (bytes) | 𝚫 (bytes) | | --- | --- | --- | --- | | addglobalcontext | 20.64 KiB | 18.83 KiB | -1855 B | | addaction | 69.28 KiB | 69.23 KiB | -50 B | | adderror | 84.99 KiB | 84.92 KiB | -64 B | | addtiming | 17.99 KiB | 15.84 KiB | -2201 B | | startview | 314.13 KiB | 320.54 KiB | 6.41 KiB | | startstopsessionreplayrecording | 13.31 KiB | 13.57 KiB | 262 B | | logmessage | 69.38 KiB | 67.67 KiB | -1748 B |

🔗 RealWorld