Allow absolute paths and enhance scopes detection

[k1LoW]

ref: #1073

Enhanced scope determination for file paths containing runbooks.
In addition, absolute paths are now allowed everywhere.

It's a bug that in some sections it was reading files in directories higher than the runbook even though there was no read:parent scope.

[github-actions]

BenchmarkManyRunbooks-4

	main (-)	#1080 (fe6b7da)	+/-
Number of iterations	1	1	0
Nanoseconds per iteration	3,552,499,031 ns/op	3,545,443,315 ns/op	-7,055,716 ns/op
Bytes allocated per iteration	1,380,558,192 B/op	1,380,285,976 B/op	-272,216 B/op
Allocs per iteration	19,132,129 allocs/op	19,133,880 allocs/op	1,751 allocs/op

Metadata

	main (-)	#1080 (fe6b7da)
goos	linux	linux
goarch	amd64	amd64
pkg	github.com/k1LoW/runn	github.com/k1LoW/runn
cpu	AMD EPYC 7763 64-Core Processor	AMD EPYC 7763 64-Core Processor

BenchmarkOpenAPI3-4

	main (-)	#1080 (fe6b7da)	+/-
Number of iterations	1	1	0
Nanoseconds per iteration	4,926,396,596 ns/op	4,829,392,596 ns/op	-97,004,000 ns/op
Bytes allocated per iteration	2,270,006,984 B/op	2,270,228,016 B/op	221,032 B/op
Allocs per iteration	31,363,380 allocs/op	31,368,675 allocs/op	5,295 allocs/op

Metadata

	main (-)	#1080 (fe6b7da)
goos	linux	linux
goarch	amd64	amd64
pkg	github.com/k1LoW/runn	github.com/k1LoW/runn
cpu	AMD EPYC 7763 64-Core Processor	AMD EPYC 7763 64-Core Processor

BenchmarkSingleRunbook-4

	main (-)	#1080 (fe6b7da)	+/-
Number of iterations	26	25	-1
Nanoseconds per iteration	46,363,292 ns/op	45,381,574 ns/op	-981,718 ns/op
Bytes allocated per iteration	22,446,132 B/op	22,473,358 B/op	27,226 B/op
Allocs per iteration	184,523 allocs/op	184,559 allocs/op	36 allocs/op

Metadata

	main (-)	#1080 (fe6b7da)
goos	linux	linux
goarch	amd64	amd64
pkg	github.com/k1LoW/runn	github.com/k1LoW/runn
cpu	AMD EPYC 7763 64-Core Processor	AMD EPYC 7763 64-Core Processor

---

Reported by octocov

[github-actions]

Code Metrics Report

	main (9990ad7)	#1080 (fe6b7da)	+/-
Coverage	64.5%	64.5%	-0.1%
Code to Test Ratio	1:0.7	1:0.7	+0.0
Test Execution Time	5m54s	6m2s	+8s

Details

  |                     | main (9990ad7) | #1080 (fe6b7da) |  +/-  |
  |---------------------|----------------|-----------------|-------|
- | Coverage            |          64.5% |           64.5% | -0.1% |
  |   Files             |             77 |              77 |     0 |
  |   Lines             |           8737 |            8832 |   +95 |
+ |   Covered           |           5640 |            5697 |   +57 |
+ | Code to Test Ratio  |          1:0.7 |           1:0.7 |  +0.0 |
  |   Code              |          16069 |           16194 |  +125 |
+ |   Test              |          12014 |           12133 |  +119 |
- | Test Execution Time |          5m54s |            6m2s |   +8s |

Code coverage of files in pull request scope (73.8% → 73.4%)

Files	Coverage	+/-
book.go	76.3%	-2.9%
cache.go	48.0%	+7.0%
cdp.go	76.8%	-0.6%
http.go	77.9%	-0.3%
include.go	90.5%	-0.6%
operator.go	80.0%	-0.2%
option.go	58.4%	-0.9%
path.go	65.0%	+3.3%
runbook.go	81.1%	-0.2%

---

Reported by octocov