feat(#3490): Attempt To Speed Up The add-refs.xsl

[volodya-lombrozo]

In this PR I change add-refs.xsl logic a bit:

1. Removed the usage of axis (like `ancestor).
2. Added the usage of indexes <xsl:key name="o-by-name" match="o[@name]" use="@name"/>

This potentially might speed up the add-refs.xsl transformation on particular files. However, initial performance measurements show rather contradictory results.

1. For example, the benchmark in eo shows performance degradation:

# Before
add-refs.xsl                         15331  5.98%
add-refs.xsl                         30528   5.96%
add-refs.xsl                         45057   5.76%

# After
add-refs.xsl                         62579   6.14%
add-refs.xsl                         84454   6.48%
add-refs.xsl                         84454   6.48%

2. However, on real files I can see significant improvement in some scenarios:

# Function.xmir 
# Before
14:12:38.018 [main] WARN  -- XSL 'add-refs' took 7s (over 5ms)
14:12:58.628 [main] WARN -- XSL 'add-refs' took 21s (over 5ms)
14:15:11.617 [main] WARN -- XSL 'add-refs' took 5s (over 5ms)
14:15:25.214 [main] WARN -- XSL 'add-refs' took 14s (over 5ms)
14:16:27.251 [main] WARN -- XSL 'add-refs' took 6s (over 5ms)
14:16:42.055 [main] WARN -- XSL 'add-refs' took 15s (over 5ms)
# After
14:58:03.620 [main] WARN -- XSL 'add-refs' took 909ms (over 5ms)
14:58:18.763 [main] WARN -- XSL 'add-refs' took 15s (over 5ms)
14:59:26.707 [main] WARN -- XSL 'add-refs' took 800ms (over 5ms)
14:59:44.261 [main] WARN -- XSL 'add-refs' took 18s (over 5ms)
15:00:51.300 [main] WARN -- XSL 'add-refs' took 807ms (over 5ms)
15:01:07.589 [main] WARN -- XSL 'add-refs' took 16s (over 5ms)

and

# Native.xmir
# Before
15:20:10.931 [main] WARN -- XSL 'add-refs' took 20s (over 5ms)
15:22:25.565 [main] WARN -- XSL 'add-refs' took 2min (over 5ms)
15:22:27.988 [main] WARN -- XSL 'add-refs' took 452ms (over 5ms)
# After
15:10:03.688 [main] WARN -- XSL 'add-refs' took 1s (over 5ms)
15:12:25.355 [main] WARN -- XSL 'add-refs' took 2min (over 5ms)
15:12:27.995 [main] WARN -- XSL 'add-refs' took 510ms (over 5ms)

Relate to #3490.

---

PR-Codex overview

This PR focuses on enhancing the check-xsl-id.groovy file by updating the nameFilter to include xs3p.xsl, while also improving the documentation in README.md and adding new functionality to the add-refs.xsl file with new functions for node processing.

Detailed summary

• Updated nameFilter in check-xsl-id.groovy to include xs3p.xsl.
• Corrected typos in README.md.
• Added xmlns:eo and xmlns:xs attributes to the xsl:stylesheet in add-refs.xsl.
• Introduced new functions: eo:closest, eo:has-intersecting-route, and eo:get-route for enhanced node processing.

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[volodya-lombrozo]

@yegor256 Could you take a look, please?

[yegor256]

@volodya-lombrozo I'm sorry, but we had to make some changes in the master, in order to fix a bug. Please, merge it into your branch (resolving one conflict).