fix: support kebab-case action inputs

[kitsuyui]

Summary

• Add kebab-case action input names while keeping legacy names for compatibility.
• Resolve kebab-case token input values before creating the Octokit client.
• Prefer kebab-case input names in docs and the dogfooding workflow.
• Re-export RuleStringPattern from the canonical interface module instead of redefining it in rules.ts.

Testing

• bun run format
• bun run lint
• bun run test
• bun run build
• git diff --check

[github-actions]

🎉 Happy commit!

• dogfooding: PR fix: support kebab-case action inputs #825 always celebrates.
• dogfooding: 99b808341ac6ccb666fd684fde85b2dd28b9abba always celebrates.
• Commit 99b808341ac6ccb666fd684fde85b2dd28b9abba is unlucky... It contains 666!.

[github-actions]

gh-counter

PR gate

	Removed	Added	+/-
TODO/FIXME	0	0	0

Repo dashboard

	main (45435c8)	#825 (932c7fe)	+/-
TODO/FIXME	0	0	0

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Reported by gh-counter

[github-actions]

Code Metrics Report

	main (45435c8)	#825 (932c7fe)	+/-
Coverage	99.0%	99.0%	0.0%
Code to Test Ratio	1:0.5	1:0.5	-0.1
Test Execution Time	1s	1s	0s

Details

  |                     | main (45435c8) | #825 (932c7fe) | +/-  |
  |---------------------|----------------|----------------|------|
  | Coverage            |          99.0% |          99.0% | 0.0% |
  |   Files             |              5 |              5 |    0 |
  |   Lines             |            107 |            107 |    0 |
  |   Covered           |            106 |            106 |    0 |
- | Code to Test Ratio  |          1:0.5 |          1:0.5 | -0.1 |
  |   Code              |           1386 |           1415 |  +29 |
  |   Test              |            758 |            758 |    0 |
  | Test Execution Time |             1s |             1s |   0s |

Code coverage of files in pull request scope (100.0% → 100.0%)

Files	Coverage	+/-	Status
src/rules.ts	100.0%	0.0%	modified

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Reported by octocov

[github-actions]

gh-build-size

Target	main	#825	+/-
Total action artifacts	23,290,052 B	23,291,815 B	+1,763 B
Runtime bundle	1,151,843 B	1,152,236 B	+393 B
Source maps	17,122,599 B	17,124,035 B	+1,436 B
Type declarations	4,973,541 B	4,973,475 B	-66 B

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Reported by gh-build-size