Introduce a higher level DisplayName struct which helps to protect against impersonation via display names

[poljar]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 92.10526% with 9 lines in your changes missing coverage. Please review.

Project coverage is 85.03%. Comparing base (05505a5) to head (2e122f4).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...ates/matrix-sdk-base/src/deserialized_responses.rs	91.66%	4 Missing ⚠️
crates/matrix-sdk-base/src/sliding_sync/mod.rs	33.33%	2 Missing ⚠️
crates/matrix-sdk-base/src/store/ambiguity_map.rs	88.23%	2 Missing ⚠️
crates/matrix-sdk-sqlite/src/state_store.rs	95.65%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4237      +/-   ##
==========================================
+ Coverage   85.01%   85.03%   +0.01%     
==========================================
  Files         274      274              
  Lines       30043    30107      +64     
==========================================
+ Hits        25542    25602      +60     
- Misses       4501     4505       +4     

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[jmartinesp]

LGTM, thanks!

[jmartinesp]

It seems like Rust doesn't like the way the lazy regexes are implemented though.

[poljar]

It seems like Rust doesn't like the way the lazy regexes are implemented though.

Yeah, though we don't mutate things but I'll see how to implement this without any compiler complaints.

[poljar]

@dkasak are you happy now with the PR? Can this be approved?