Add repository file archives and compact rank metadata

[Malkovsky]

• New serialization format: file archive

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit:6dd0ddf548

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[codecov]

Codecov Report

❌ Patch coverage is 93.15726% with 57 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.80%. Comparing base (6683da7) to head (2156104).

Files with missing lines	Patch %	Lines
include/pixie/file_archive.h	91.39%	7 Missing and 22 partials ⚠️
include/pixie/wavelet_tree/index.h	85.00%	7 Missing and 14 partials ⚠️
include/pixie/rank_select/support.h	92.42%	2 Missing and 3 partials ⚠️
include/pixie/storage/aligned.h	92.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@ Coverage Diff @@## main #63 +/- ##
==========================================
+ Coverage 90.53% 90.80% +0.27% 
==========================================
Files 45 47 +2 Lines 11475 12302 +827 Branches 1721 1771 +50 ==========================================
+ Hits 10389 11171 +782 + Misses 535 532 -3 - Partials 551 599 +48 

Flag	Coverage Δ
gcov	90.80% <93.15%> (+0.27%)	⬆️

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[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit:ec49150e50

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit:520aa411d1

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".