feat: add 8 composable quality ESLint rules

[kelsos]

Summary

• Add 8 new ESLint rules enforcing composable best practices (based on VueUse style guide)
• Add strict and stylistic config presets alongside existing recommended
• Fix config filter bug: was checking meta.recommended instead of meta.docs.recommendation

strict rules (5)

Rule	Fixable	Description
composable-no-default-export	No	Forbid default exports in composable files
composable-prefer-shallowref	Yes	Prefer shallowRef() for primitive values
composable-return-readonly	Yes	Wrap returned refs with readonly()
composable-require-cleanup	No	Require cleanup hooks for side effects
composable-ssr-safety	No	Guard window/document/navigator access

stylistic rules (3)

Rule	Fixable	Description
composable-naming-convention	No	Enforce Use{Name}Options/Use{Name}Return naming
composable-input-flexibility	Yes	Prefer MaybeRefOrGetter over Ref for params
require-jsdoc-on-composable-options	No	Require JSDoc on Use*Options interface properties

Tested against rotki frontend composables

Rule	Hits
composable-return-readonly	146
composable-prefer-shallowref	38
require-jsdoc-on-composable-options	30
composable-input-flexibility	30
composable-naming-convention	13
composable-ssr-safety	10
composable-require-cleanup	4
composable-no-default-export	0

272 total warnings (215 auto-fixable), no false positives observed.

Test plan

• pnpm run build — passes
• pnpm run test — 134 tests pass (16 test files)
• pnpm run lint — 0 errors
• pnpm run typecheck — passes
• pnpm run docs:build — passes
• Tested against rotki frontend composables

[codecov-commenter]

Codecov Report

❌ Patch coverage is 81.68168% with 61 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.20%. Comparing base (ecc108b) to head (419e7fe).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/rules/composable-ssr-safety.ts	82.60%	9 Missing and 3 partials ⚠️
src/rules/composable-require-cleanup.ts	82.25%	9 Missing and 2 partials ⚠️
src/utils/composable.ts	66.66%	8 Missing and 2 partials ⚠️
src/rules/composable-naming-convention.ts	84.31%	8 Missing ⚠️
src/rules/composable-input-flexibility.ts	78.78%	6 Missing and 1 partial ⚠️
src/rules/composable-return-readonly.ts	81.81%	5 Missing and 1 partial ⚠️
src/utils/config.ts	0.00%	3 Missing and 1 partial ⚠️
src/rules/require-jsdoc-on-composable-options.ts	88.88%	2 Missing ⚠️
src/rules/composable-no-default-export.ts	94.73%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
- Coverage   85.12%   84.20%   -0.93%     
==========================================
  Files          19       28       +9     
  Lines         726     1057     +331     
  Branches      206      325     +119     
==========================================
+ Hits          618      890     +272     
- Misses         94      144      +50     
- Partials       14       23       +9     

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