Add experimental-inline-sourcepos to cli options

[digitalmoksha]

Adds experimental-inline-sourcepos to command line (already available in the API) to make it available to any who wants to use it, and make it easier to quickly test from command line.

[github-actions]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
./bench.sh ./comrak-adbefa5	322.6 ± 1.3	321.1	327.4	2.95 ± 0.02
./bench.sh ./comrak-main	320.1 ± 1.5	316.7	324.7	2.92 ± 0.02
./bench.sh ./pulldown-cmark	109.5 ± 0.7	108.5	112.0	1.00
./bench.sh ./cmark-gfm	117.7 ± 0.7	116.9	120.1	1.08 ± 0.01
./bench.sh ./markdown-it	471.9 ± 1.4	470.0	474.9	4.31 ± 0.03

Run on Sun Aug 18 23:15:16 UTC 2024