wcwidth 0.9.2 integration

[jquast]

• wcwidth 0.9.2 integration, ~2-15x performance improvement to text alignment
• bumps python-requires to 3.9 to match wcwidth's
• uses terminal-specific correction tables for alignment functions
• adds conditional XTVERSION query on class initialization
  • if TERM_PROGRAM environment value is defined, no query is made
• add clip() as more direct wrapper of wcwidth.clip(), a better 'truncate()', requested in Terminal.truncate moves sequence to end of string #402
• adds ambiguous width in alignment support, but not by default (documented)
  • calling detect_ambiguous_width() after class initialization auto-applies the results to alignment function

alignments for the below varies among all identifiable terminals, but are now aligned, 10 of them on linux in screenshot below:

Unidentifiable terminals continue to be out of alignment sometimes, they can't be helped:

Actually, there are many more ways to identify a terminal, at least ENQ, and some terminal authors even believe DA1 response, but I think it is best to support only the progressive/modern methods. And these are the only kinds of terminals supported by wcstwidth() anyway.

[codspeed]

Merging this PR will improve performance by ×3.8

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 19 improved benchmarks
✅ 12 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	test_length_emoji_vs16	672.5 µs	43.8 µs	×15
⚡	test_length_cjk	770.2 µs	69.7 µs	×11
⚡	test_truncate_emoji_zwj	966.1 µs	89.7 µs	×11
⚡	test_length_emoji_zwj	188 µs	28.5 µs	×6.6
⚡	test_center_cjk	780.1 µs	130.4 µs	×6
⚡	test_ljust_cjk	778.3 µs	130.7 µs	×6
⚡	test_rjust_cjk	777.8 µs	131 µs	×5.9
⚡	test_truncate_cjk	518.7 µs	97.5 µs	×5.3
⚡	test_center_ansi	389.2 µs	108.2 µs	×3.6
⚡	test_rjust_ansi	382.7 µs	108 µs	×3.5
⚡	test_ljust_ansi	381.1 µs	108.3 µs	×3.5
⚡	test_center_emoji_zwj	206 µs	69.1 µs	×3
⚡	test_rjust_emoji_zwj	202.7 µs	69.1 µs	×2.9
⚡	test_ljust_emoji_zwj	202.8 µs	69.2 µs	×2.9
⚡	test_length_ansi	373.4 µs	170.2 µs	×2.2
⚡	test_center_ascii	47 µs	34.7 µs	+35.42%
⚡	test_rjust_ascii	43.6 µs	34.6 µs	+25.97%
⚡	test_ljust_ascii	43.6 µs	34.7 µs	+25.71%
⚡	test_length_ascii	37 µs	31.2 µs	+18.41%

Tip

Curious why performance improved? Comment @codspeedbot explain why performance improved on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing jq/wcwidth-0.9.1 (f55f278) with master (362dbe2)}

[codecov]

Codecov Report

❌ Patch coverage is 99.29078% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 97.75%. Comparing base (362dbe2) to head (f55f278).

Files with missing lines	Patch %	Lines
blessed/terminal.py	98.50%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #420      +/-   ##
==========================================
+ Coverage   97.72%   97.75%   +0.02%     
==========================================
  Files          13       13              
  Lines        4052     4106      +54     
  Branches      739      695      -44     
==========================================
+ Hits         3960     4014      +54     
+ Misses         71       70       -1     
- Partials       21       22       +1     

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