Add synonym/decomposing support for specific words

[yrodiere]

See #40 (comment):

Customize analyzers so that "dev services" is considered a synonym of "devservices". This is important because we do appear to use "devservices", without a space, in the :topic: metadata.

These filters may be relevant (from most likely to help to least likely):

• https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-hyp-decomp-tokenfilter.html
• https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-dict-decomp-tokenfilter.html
• https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-common-grams-tokenfilter.html
• https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-word-delimiter-graph-tokenfilter.html (would only work for e.g. DevServices, not devservices)

Other "synonyms" may be needed, see comments on this issue.

[yrodiere]

vertx should be a synonym for vert.x

See https://quarkusio.zulipchat.com/#narrow/stream/187038-dev/topic/.E2.9C.94.20How.20exactly.20does.20filtering.20work.20on.20the.20Guides.20page.3F

[yrodiere]

RestEASY should be handled particularly too: Rest easy, resteasy, restEasy should all be considered the same thing.

EDIT: And when searching for REST we'd like to have RestEasy highlighted.