restructure project following best practices

https://go.dev/doc/modules/layout
This also enables us to later import just the db interaction part
say to the gemini capsule backend go project.

entry.go

@@ -1,45 +0,0 @@
-package main
-
-import (
-	"gemini_site/gemlog"
-
-	tea "github.com/charmbracelet/bubbletea"
-)
-
-type EntryPageModel struct {
-	entry gemlog.GemlogEntry
-}
-
-func initialEntryPageModel() EntryPageModel {
-	return EntryPageModel{}
-}
-
-func (m EntryPageModel) Update(msg tea.Msg, active bool, ctx *context) (EntryPageModel, tea.Cmd) {
-	switch msg := msg.(type) {
-	case gemlog.GemLogLoaded:
-		m.entry = msg.Log
-	case tea.KeyMsg:
-		if !active {
-			return m, nil
-		}
-		switch msg.String() {
-		case "left", "h":
-			cmd := func() tea.Msg {
-				return SwitchPages{Page: EntryList}
-			}
-			return m, cmd
-		}
-	}
-
-	return m, nil
-
-}
-
-func (m EntryPageModel) View() string {
-	s := m.entry.Slug
-	s += "\n\n"
-	s += m.entry.Gemtxt
-	s += "\n\n-------------------------\n"
-	s += "\n\nPress h or left arrow to go back"
-	return s
-}