feat: multi-language complexity analysis (#147)

* fix: strict type validation for threshold values in complexity queries

Replace loose `!= null` checks with `typeof === 'number' && Number.isFinite()`
to prevent `Number("")`, `Number(null)`, and `Number(true)` from silently
coercing into valid SQL values. Add integration test verifying exceeds
arrays and summary.aboveWarn are correctly computed.

Addresses Greptile review feedback on #136.

Impact: 2 functions changed, 3 affected

* docs: add complexity, communities, and manifesto to all docs

Update README, CLAUDE.md, BACKLOG, titan-paradigm, recommended-practices,
and CLI/MCP examples to reflect today's merged PRs: complexity metrics
(#130/#139), Louvain community detection (#133/#134), and manifesto rule
engine (#138). Updates MCP tool count from 21 to 24 (25 in multi-repo),
marks backlog items 6/11/21/22 as done, and adds real CLI output examples.

* fix: remove redundant condition in paginate guard clauses

When limit === undefined, limit !== 0 is always true — the && check
was dead code. Simplified to just check limit === undefined.

Impact: 2 functions changed, 18 affected

* docs: update dogfood report with fix statuses

All 4 bugs now fixed (PR #117 merged, #116 closed via reverse-dep
cascade). 3 of 4 suggestions addressed. MCP tool counts updated
18→23 / 19→24. Rating upgraded 7/10 → 9/10 post-fix.

* fix: rename misleading test to match actual behavior

Test was named "handles non-numeric thresholds gracefully" but only
validated baseline exceeds/aboveWarn with valid thresholds. Actual
non-numeric threshold tests exist separately. Renamed to "produces
correct exceeds and aboveWarn with valid thresholds".

* fix: update stale MCP tool count in dogfood skill (21→24)

* feat: add complexity analysis for Python, Go, Rust, Java, C#, Ruby, PHP

Parameterize the complexity algorithm to support all 10 languages instead
of just JS/TS/TSX. Add per-language COMPLEXITY_RULES, HALSTEAD_RULES, and
COMMENT_PREFIXES with three else-if detection patterns (else-wraps-if,
explicit elif, alternative field). Guard against tree-sitter keyword leaf
tokens that share node type names with their parent constructs.

Impact: 4 functions changed, 4 affected

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: carlos-alm