refactor: merged sources of mail-headers,mail-internals,mail-core, mail

Originally it was palaned to do a merge with `--allow-unrelated-history`
but this can not be doesn as `mail-core` has a "invalid" history which
has a merge conflict **with itself**. So even rewinding the history on
a empty repo is not possible.

Instead the code was directly coppied over losing history.

But the history is still available in the different
`history-backup-*` branches. It is just that the past history
is decoupled from the current history.

4 files changed, 6 insertions, 0 deletions

diff --git a/mail/example_resources/templates/template_a/html/logo.png b/mail/example_resources/templates/template_a/html/logo.png
new file mode 100644
index 0000000..f58bea6
--- /dev/null
+++ b/mail/example_resources/templates/template_a/html/logo.png
diff --git a/mail/example_resources/templates/template_a/html/mail.html b/mail/example_resources/templates/template_a/html/mail.html
new file mode 100644
index 0000000..a377e53
--- /dev/null
+++ b/mail/example_resources/templates/template_a/html/mail.html
@@ -0,0 +1,5 @@
+{% extends "base_mail.html" %}
+
+{% block head %}<meta charset="utf-8">{% endblock head %}
+
+{% block body %}logo: <img src="cid:{{cids.logo}}"> Hy {{data.name}}.{% endblock body %}
diff --git a/mail/example_resources/templates/template_a/portfolio.pdf b/mail/example_resources/templates/template_a/portfolio.pdf
new file mode 100644
index 0000000..3748b05
--- /dev/null
+++ b/mail/example_resources/templates/template_a/portfolio.pdf
diff --git a/mail/example_resources/templates/template_a/text/mail.txt b/mail/example_resources/templates/template_a/text/mail.txt
new file mode 100644
index 0000000..903c8ce
--- /dev/null
+++ b/mail/example_resources/templates/template_a/text/mail.txt
@@ -0,0 +1 @@
+Hy {{data.name}}.
\ No newline at end of file