designcourse ⚡️ reduce bundle size by trimming `pako`

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Motivation

This PR reduces the RUM bundle size by trimming the pako embedded in our codebase.

pako is a library implementing zlib in JS. pako/zlib provides some features and customizations that we don't use. This PR removes some of those features.
the pako build that we copied have some unnecessary verbose syntax, like relying on properties for constants (ex: constants.Z_SYNC_FLUSH = xxx, minified as x.Z_SYNC_FLUSH=xxx) instead of using manglable variable declarations (var Z_SYNC_FLUSH = xxx, minified as var x=xxx)

Changes

remove support for options level, windowBit, dictionary, header and gzip, and associated code
some syntaxic changes

Please review commit by commit.

Testing

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

I have gone over the contributing documentation.

Jul 19 '24 14:07 BenoitZugmeyer

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	161.62 KiB	153.59 KiB	-8225 B	-4.97%	✅
Logs	57.95 KiB	57.95 KiB	0 B	0.00%	✅
Rum Slim	110.14 KiB	110.14 KiB	0 B	0.00%	✅
Worker	25.21 KiB	17.17 KiB	-8225 B	-31.87%	✅

🚀 CPU Performance

Action Name	Base Average Cpu Time (ms)	Local Average Cpu Time (ms)	𝚫
addglobalcontext	0.001	0.002	0.001
addaction	0.030	0.053	0.023
adderror	0.031	0.038	0.007
addtiming	0.001	0.001	0.000
startview	0.913	1.411	0.498
startstopsessionreplayrecording	0.780	1.011	0.231
logmessage	0.019	0.023	0.004

🧠 Memory Performance

Action Name	Base Consumption Memory (bytes)	Local Consumption Memory (bytes)	𝚫 (bytes)
addglobalcontext	20.46 KiB	19.59 KiB	-889 B
addaction	72.73 KiB	70.35 KiB	-2443 B
adderror	86.60 KiB	85.91 KiB	-704 B
addtiming	19.47 KiB	17.79 KiB	-1714 B
startview	349.22 KiB	351.36 KiB	2.14 KiB
startstopsessionreplayrecording	14.21 KiB	12.46 KiB	-1796 B
logmessage	70.55 KiB	69.00 KiB	-1583 B

🔗 RealWorld

Jul 19 '24 14:07 cit-pr-commenter[bot]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.67%. Comparing base (2490414) to head (dda2fb5).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2878      +/-   ##
==========================================
- Coverage   93.68%   93.67%   -0.02%     
==========================================
  Files         266      266              
  Lines        7584     7584              
  Branches     1687     1687              
==========================================
- Hits         7105     7104       -1     
- Misses        479      480       +1

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