Generate verification tokens and sendout SMTP relay from endpoint.
Authentication values rely on environment variables. The new trial
subscription endpoint copies the existing one but adds the trial days
parameter.

Creating separate endpoints for each webhook simplifies value checking for
event.Type and HookKeys while being easy to test for errors.

Empty branch IDs and missing payment information caused network errors
and a missing billing component.

Includes the associated Go functions for inserting and selecting given a
specific user ID or subscription ID. Also adds required HTML tags and
HTTP queries for subscription process during user registration.

To make requests to Go API endpoints for registration from a PHP page,
there needs to be local routing between the two servers. This method
avoids needing Apache installed seperately for development builds while
allowing it to still be used in production if necessary.

Secures the user registration endpoint.

A new template file needed to be created to allow custom javascript in
a grav page. The JS file will mount the transpiled Vue app.

Store only files relevant to the project by tracking only the user/
directory.

At most one result should exist for each loan stored but not redeclaring
the 'estimate' variable within the seed loop caused the loan entries of
the first estimate to be copied onto the second, which caused an error
while seeding result entries.

Also seperate stages of seeding into other functions.

Also structure CLI functions to allow for `skouter dev seed` command.

Summary component was moved to master.tpl because sub-template calls
allow only one argument to be passed. Passing info for both Estimate and
Loan structs dynamically would involve looping during template
execution, or calling a custom function to restructure the estimate,
which are all too complicated.

Split comparison, summary, and header sections into seperate files to
reuse headers more easily and make future changes easier.