xactmon: Deploy xactmon

`xactmon` is a new tool I developed to parse transaction notifications
from banks and automatically import them into my personal finance
tracker.  It is designed in a modular fashion, composed of three main
components:

* Receiver
* Processor
* Importer

Components communicate with one another using an AMQP exchange.
Hypothetically, there could be multipel implementations of the receiver
and importer components.  Right now, there is only a JMAP receiver,
which fetches email messages (from Fastmail), and a Firefly III
importer.  The processor is a singleton, handling notifications from the
receiver, parsing them into a normalized format, and passing them on to
the importer.  It uses a set of rules to decide how to parse the
messages, and supports using either a regular expression with named
capture groups or an Awk script to extract the relevant information.

xactmon/rules.toml

@@ -0,0 +1,19 @@
+[[rule]]
+name = "Commerce Bank"
+match = "commercebankalerts@commercebank.com"
+date_fmt = "%m-%d-%Y"
+awk_script = "/etc/xactmon/commerce.awk"
+
+[[rule]]
+name = "Chase (Amazon Rewards) Visa"
+match = "no.reply.alerts@chase.com"
+date_fmt = "%b %d, %Y at %-I:%M %p"
+regex = 'Account\s*(?P<account>.+)\n\s*Date\s+(?P<date>.+[AP]M).*\n\s*Merchant\s+(?P<description>.+)\n\s*Amount\s+\$(?P<amount>[0-9]+\.[0-9]{2})'
+
+[[rule]]
+name = "HSA Bank"
+match = "hsabank.com"
+date_fmt = "%m/%d/%Y"
+account = "HSA Bank HSA"
+default_description = "Debit Card Purchase"
+regex = '\$(?P<amount>[0-9]+\.[0-9]{2}) on (?P<date>[0-9]{1,2}/[0-9]{1,2}/[0-9]{4}).'