SchwarzDigits / hypermatch

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v2.3: IP networks, wildcard paths, Go helpers and faster exclusions (#17)

* test: cover wide JSON events and explanations with alternatives

MatchJSON grows its table of paths once an event has more than eight
paths the rules refer to, which no test did so far. The new test
matches events with up to 300 such paths and repeats a path after the
table has grown.

Another test checks how an explanation shows alternatives, as text and
as JSON. wildcardLeaf loses a case that patterns with escapes never
reach.

* feat: build rules in Go with less typing

Cond, Or, Equals, Prefix, Suffix, Wildcard, AnyOf, AllOf, AnythingBut,
LessThan, LessThanOrEqual, GreaterThan, GreaterThanOrEqual,
NumericEquals, Between, Exists and Absent fill in the structs of a
rule, so that

    hypermatch.Cond("team", hypermatch.Equals("shop"))

replaces

    hypermatch.Condition{Path: "team", Pattern: hypermatch.Pattern{
        Type: hypermatch.PatternEquals, Value: "shop"}}

The package example and the README use them, and new runnable examples
show alternatives with $or and numeric patterns.

* feat: match IP addresses against networks with cidr

The cidr pattern matches IPv4 and IPv6 addresses inside a prefix such
as 10.0.0.0/8. Every distinct prefix length on a path costs one hash
lookup of the masked address. Addresses are parsed without allocating,
also for values that are not addresses, and the parser is fuzzed
against net/netip.

The prefix and suffix lengths of a group now share one pointer, which
keeps groups in their size class.

* feat: match all fields below a path with wildcard paths

A condition on a path ending in ".*", such as "labels.*", looks at the
values of all paths that begin with "labels.", as if they were one
property. Match adds the values of such paths to one more span, and
MatchJSON records the values below an open wildcard path for it, also
for keys that contain ".". Rule sets without wildcard paths only pay
for a nil check.

Paths ending in ".*" matched... (continued)

413 of 415 new or added lines in 9 files covered. (99.52%)

2303 of 2367 relevant lines covered (97.3%)

172018.51 hits per line