Read stacks filter patterns from files - #6

Stacked on #5: this PR's base is stacks-native-frames, so its diff shows only this change. Retarget it to main once that PR merges.

Change

stacks gains --include-from FILE and --exclude-from FILE, so a list of patterns you maintain, such as a service's idle waits, can live in a file instead of being repeated on every command line.

• Both options repeat, and their patterns are added after any given with --include/--exclude. The filter rules are unchanged: any matching pattern counts, and an exclude beats an include.
• A file holds one regular expression per line, read as UTF-8, with CRLF line endings accepted.
• Blank lines and lines starting with # are skipped. \# escapes a pattern that starts with #.
• Every other line is used exactly as written, spaces included, because frame names such as C2 Runtime complete_monitor_locking contain spaces.
• A file with no patterns is refused rather than read as no filter; for an include, no filter would keep everything.
• An invalid pattern is reported with its file and line, and a missing file fails with its name.
• The --summary file lists the patterns read.

The usage text, README §5 (with an --exclude-from example) and OFFLINE.md are updated.

Verification

./gradlew spotlessCheck :jonoffcpu-correlator:check passes. New cases in StackProfileTest.filters:

• a pattern file gives the same output as the same patterns passed with repeated --include;
• inline and file patterns combine, as the summary shows;
• a pattern starting with \# is kept;
• an empty file, an invalid pattern (reported with its line) and a missing file are each refused.