Reactions layout improvements

[langleyd]

What's in this PR

• Add the custom reaction layout that only shows the expand UI after 2 lines.
• It also enforces that the add more and expand buttons are always on the same line.
• In LTR languages we want an incoming message's reactions to be LRT and outgoing to be RTL.
• For RTL languages it should be the opposite.
• Add more button should have primary text colour.

What does it look like

[github-actions]

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[jmartinesp]

I've added a few commits to take care of lint issues, I hope you don't mind.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
7 Code Smells

0.0% Coverage
0.0% Duplication

[codecov]

Codecov Report

Patch coverage: 62.30% and no project coverage change.

Comparison is base (f32a177) 55.44% compared to head (404caed) 55.45%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #912   +/-   ##
========================================
  Coverage    55.44%   55.45%           
========================================
  Files          961      962    +1     
  Lines        24395    24462   +67     
  Branches      4951     4972   +21     
========================================
+ Hits         13526    13565   +39     
- Misses        8707     8726   +19     
- Partials      2162     2171    +9     

Impacted Files	Coverage Δ
...s/impl/timeline/components/TimelineItemEventRow.kt	55.88% <0.00%> (-0.24%)	⬇️
...l/timeline/components/TimelineItemReactionsView.kt	49.09% <51.21%> (-12.25%)	⬇️
...timeline/components/TimelineItemReactionsLayout.kt	67.44% <67.44%> (ø)
...impl/timeline/components/MessagesReactionButton.kt	71.23% <100.00%> (+0.39%)	⬆️

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[jmartinesp]

LGTM, thanks!