Add Deebot X5 PRO OMNI support

[genelee26]

Add support for DEEBOT X5 PRO OMNI, merge the "CapabilityWater" from X2 and base on the X8 Pro.

[edenhaus]

Did you test this change?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.98%. Comparing base (4c3ecd6) to head (a5e5036).
⚠️ Report is 2 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1473      +/-   ##
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+ Coverage   94.95%   94.98%   +0.03%     
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  Files         157      158       +1     
  Lines        6144     6187      +43     
  Branches      350      350              
==========================================
+ Hits         5834     5877      +43     
  Misses        248      248              
  Partials       62       62              

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[genelee26]

Sorry for the late reply — I was on vacation and just got back to this.

Yes, I tested all of this on my physical Deebot X5 PRO OMNI device and verified sensor readings against the official Ecovacs app.

Testing process:

1. Started with the X8 PRO definition as the base, since the X5 PRO OMNI shares most capabilities with it. Ran a full test of all capabilities — clean, charge, fan speed, map, life span, station, settings, stats, etc. All readings matched the app.

2. During testing, I found that water_amount on the X5 PRO OMNI uses discrete levels (LOW/MEDIUM/HIGH) rather than a continuous slider like the X8 PRO. The level count matched the X2's implementation exactly.

3. Merged CapabilityWater from the X2 definition, then re-tested the water module independently — water amount switching and mop_attached status both worked correctly and matched the app.

All capabilities defined in this PR have been verified on real hardware.

[edenhaus]

Thanks @genelee26 👍

[codspeed-hq]

Merging this PR will not alter performance

✅ 113 untouched benchmarks

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_{Comparing genelee26:dev (a5e5036) with dev (4c3ecd6)}